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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">Front. Psychol.</journal-id>
<journal-title>Frontiers in Psychology</journal-title>
<abbrev-journal-title abbrev-type="pubmed">Front. Psychol.</abbrev-journal-title>
<issn pub-type="epub">1664-1078</issn>
<publisher>
<publisher-name>Frontiers Media S.A.</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.3389/fpsyg.2024.1433437</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Psychology</subject>
<subj-group>
<subject>Original Research</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group>
<article-title>Neuroactive hormones and personal growth: associations in Chilean adolescents (ages 12&#x2013;25) with ovulatory dysfunction</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author"><name><surname>del R&#x00ED;o</surname> <given-names>Juan Pablo</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref><xref ref-type="aff" rid="aff2"><sup>2</sup></xref><xref ref-type="aff" rid="aff3"><sup>3</sup></xref>
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</contrib>
<contrib contrib-type="author"><name><surname>Tapia</surname> <given-names>Valeska</given-names></name><xref ref-type="aff" rid="aff3"><sup>3</sup></xref>
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<contrib contrib-type="author"><name><surname>Soto</surname> <given-names>Hugo</given-names></name><xref ref-type="aff" rid="aff3"><sup>3</sup></xref>
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<contrib contrib-type="author" corresp="yes"><name><surname>Vigil</surname> <given-names>Pilar</given-names></name><xref ref-type="aff" rid="aff3"><sup>3</sup></xref><xref ref-type="corresp" rid="c001"><sup>&#x002A;</sup></xref>
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<aff id="aff1"><sup>1</sup><institution>Departamento de Psiquiatr&#x00ED;a y Salud Mental de la Infancia y de la Adolescencia, Facultad de Medicina, Universidad de Chile</institution>, <addr-line>Santiago</addr-line>, <country>Chile</country></aff>
<aff id="aff2"><sup>2</sup><institution>Millennium Nucleus to Improve the Mental Health of Adolescents and Youths Imhay</institution>, <addr-line>Santiago</addr-line>, <country>Chile</country></aff>
<aff id="aff3"><sup>3</sup><institution>Reproductive Health Research Institute</institution>, <addr-line>Santiago</addr-line>, <country>Chile</country></aff>
<author-notes>
<fn fn-type="edited-by" id="fn0001">
<p>Edited by: Manuel E. Cort&#x00E9;s, Universidad Bernardo O&#x2019;Higgins, Chile</p>
</fn>
<fn fn-type="edited-by" id="fn0002">
<p>Reviewed by: Francisco Westermeier, FH Joanneum, Austria</p>
<p>Sebasti&#x00E1;n Beltr&#x00E1;n-Castillo, Universidad Bernardo O&#x2019;Higgins, Chile</p>
</fn>
<corresp id="c001">&#x002A;Correspondence: Pilar Vigil, <email>pilarvigil@rhri.cl</email></corresp>
</author-notes>
<pub-date pub-type="epub">
<day>21</day>
<month>08</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="collection">
<year>2024</year>
</pub-date>
<volume>15</volume>
<elocation-id>1433437</elocation-id>
<history>
<date date-type="received">
<day>15</day>
<month>05</month>
<year>2024</year>
</date>
<date date-type="accepted">
<day>01</day>
<month>08</month>
<year>2024</year>
</date>
</history>
<permissions>
<copyright-statement>Copyright &#x00A9; 2024 del R&#x00ED;o, Tapia, Soto and Vigil.</copyright-statement>
<copyright-year>2024</copyright-year>
<copyright-holder>del R&#x00ED;o, Tapia, Soto and Vigil</copyright-holder>
<license xlink:href="http://creativecommons.org/licenses/by/4.0/">
<p>This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.</p>
</license>
</permissions>
<abstract>
<sec>
<title>Introduction</title>
<p>Hormones produced by the hypothalamic&#x2013;pituitary&#x2013;adrenal-gonadal (HPAG) axis are crucial for modulating central nervous system (CNS) function and development throughout a person&#x2019;s life. Disruptions in HPAG function can impact psychological development, particularly during adolescence&#x2014;a period marked by psychological growth and the maturation of the HPAG axis. An early indicator of HPAG alterations is ovulatory dysfunction (OD), a common condition among adolescents.</p>
</sec>
<sec>
<title>Methods</title>
<p>This study explored the associations between neuroactive hormones and personal growth in adolescents with OD. Female participants aged 12&#x2013;25 years with OD were recruited, and assessments were conducted to profile their basic hormonal levels and various dimensions of individual development, including self-concept clarity, sense of coherence, self-esteem, perfectionism, self-control, and mood states.</p>
</sec>
<sec>
<title>Results</title>
<p>Adolescents with OD (<italic>n</italic>&#x2009;=&#x2009;117) had lower self-concept clarity and self-esteem compared to reference data. A significant portion of the sample displayed elevated levels of tension (71.25%), confusion (62.5%), fatigue (58.22%), and depression (52.6%). Self-esteem scores were negatively correlated with DHEAS (<italic>r</italic>&#x2009;=&#x2009;&#x2212;0.224; <italic>p</italic>&#x2009;=&#x2009;0.026) and glucose (<italic>r</italic>&#x2009;=&#x2009;&#x2212;0.249; <italic>p</italic>&#x2009;=&#x2009;0.010). Higher levels of free testosterone were associated with increased depression scores (coef&#x2009;=&#x2009;0.2398; <italic>p</italic>&#x2009;=&#x2009;0.002), whereas higher estradiol levels were linked to lower aggressiveness scores (coef&#x2009;=&#x2009;&#x2212;0.0648; <italic>p</italic>&#x2009;=&#x2009;0.001).</p>
</sec>
<sec>
<title>Discussion</title>
<p>These findings indicate that hormonal imbalances in adolescents with OD could affect personal growth. Further research is needed to establish causal relationships between the variables considered.</p>
</sec>
</abstract>
<kwd-group>
<kwd>personal growth</kwd>
<kwd>neurosteroids</kwd>
<kwd>ovulatory dysfunction</kwd>
<kwd>adolescents</kwd>
<kwd>developmental psychology</kwd>
</kwd-group>
<counts>
<fig-count count="2"/>
<table-count count="2"/>
<equation-count count="0"/>
<ref-count count="71"/>
<page-count count="9"/>
<word-count count="5917"/>
</counts>
<custom-meta-wrap>
<custom-meta>
<meta-name>section-at-acceptance</meta-name>
<meta-value>Neuropsychology</meta-value>
</custom-meta>
</custom-meta-wrap>
</article-meta>
</front>
<body>
<sec sec-type="intro" id="sec1">
<label>1</label>
<title>Introduction</title>
<p>Personal growth can be conceptualized as a progression toward authenticity and life satisfaction (<xref ref-type="bibr" rid="ref46">Rogers, 1959</xref>), integrating various individual aspects (<xref ref-type="bibr" rid="ref28">Luis et al., 2022</xref>) and encompassing coexistence with others (<xref ref-type="bibr" rid="ref40">Or&#x00F3;n, 2015</xref>; <xref ref-type="bibr" rid="ref21">Guzm&#x00E1;n-Montiel, 2019</xref>). To thoroughly assess personal growth, it is important to consider psychological constructs such as self-awareness, openness to new experiences and change, existential persistence, independence, self-responsibility, self-compassion, and empathy toward others (<xref ref-type="bibr" rid="ref32">Maurer et al., 2023</xref>).</p>
<p>Although personal growth is a continuous process, adolescence is a crucial stage (<xref ref-type="bibr" rid="ref17">Erikson, 1968</xref>). This period encompasses psychological development and the maturation of significant physiological systems, including the hypothalamic&#x2013;pituitary&#x2013;adrenal-gonadal (HPAG) axis (<xref ref-type="bibr" rid="ref56">Spaziani et al., 2021</xref>). The hormones produced by the HPAG axis are pivotal in regulating brain function and maturation throughout life, demonstrating the alignment between psychological and biological development (<xref ref-type="bibr" rid="ref33">Merleau-Ponty, 2002</xref>). In fact, hormones, such as androgens or estrogens, can be synthesized outside the central nervous system (CNS), cross the blood&#x2013;brain barrier, and regulate neuronal activity (<xref ref-type="bibr" rid="ref70">Zheng, 2009</xref>).</p>
<p>Neuroactive hormones, such as steroids and peptides, play a critical role in brain maturation (<xref ref-type="bibr" rid="ref71">Zweifel and O&#x2019;Brien, 1997</xref>; <xref ref-type="bibr" rid="ref67">Vigil et al., 2011</xref>; <xref ref-type="bibr" rid="ref35">Mueller et al., 2014</xref>; <xref ref-type="bibr" rid="ref50">Schulz and Sisk, 2016</xref>) and influence neurotransmission processes. Their effects on the CNS are classified as organizational (permanent structural changes) or activational (modulation of neuronal activity) (<xref ref-type="bibr" rid="ref4">Arnold, 1985</xref>). Organizational effects include myelination, apoptosis, dendritic spine remodeling, and neuronal pruning, while activational effects can rapidly impact neurotransmitter systems (<xref ref-type="bibr" rid="ref49">Schiller et al., 2016</xref>; <xref ref-type="bibr" rid="ref25">Krolick et al., 2018</xref>). These activities are partly due to the widespread expression and activation of steroid hormone receptors and p450 aromatase in CNS cells, including neurons, astrocytes, microglia, oligodendrocytes, and Schwann cells (<xref ref-type="bibr" rid="ref34">Montelli et al., 2012</xref>; <xref ref-type="bibr" rid="ref5">Azcoitia et al., 2021</xref>).</p>
<p>The hormonal influence on the CNS is particularly significant for women. Fluctuations in sex hormones throughout a woman&#x2019;s life significantly impact susceptibility to mood disorders, such as premenstrual dysphoric disorder, postpartum depression, and perimenopausal depression (<xref ref-type="bibr" rid="ref8">Bloch et al., 2003</xref>; <xref ref-type="bibr" rid="ref55">Smith et al., 2014</xref>; <xref ref-type="bibr" rid="ref58">Sundstr&#x00F6;m-Poromaa and Gingnell, 2014</xref>). Hormones from the HPAG axis also affect cognitive functions such as decision-making, emotional recognition, and memory (<xref ref-type="bibr" rid="ref22">Hampson, 1990</xref>; <xref ref-type="bibr" rid="ref58">Sundstr&#x00F6;m-Poromaa and Gingnell, 2014</xref>; <xref ref-type="bibr" rid="ref43">Pillerov&#x00E1; et al., 2022</xref>). Moreover, disruptions in the HPAG axis can negatively affect mental wellbeing and identity development (<xref ref-type="bibr" rid="ref65">Vigil et al., 2016</xref>). For example, polycystic ovary syndrome (PCOS), the most common endocrine disorder in reproductive-age women, is linked to a high prevalence of psychological symptoms like melancholy, sadness, and depression, worsened by menstrual irregularities (<xref ref-type="bibr" rid="ref52">Shakerardekani et al., 2011</xref>).</p>
<p>Ovulatory dysfunction (OD) is an early sign of HPAG disruptions, with abnormalities in ovulation and irregular cycles often being the first indicators of underlying endocrinological alterations (<xref ref-type="bibr" rid="ref66">Vigil et al., 2017</xref>). Since the hormones that regulate ovulation also influence the CNS, OD could potentially affect CNS maturation and psychological development (<xref ref-type="bibr" rid="ref44">Rahiminejad et al., 2014</xref>; <xref ref-type="bibr" rid="ref58">Sundstr&#x00F6;m-Poromaa and Gingnell, 2014</xref>). However, few studies have specifically examined the associations between OD and psychological development. We hypothesize that OD in adolescents is associated with alterations in psychological aspects of personal growth, mediated by key hormones involved in neural and HPAG axis functioning. Therefore, the study objective is to characterize the possible association between psychological aspects of personal growth and key hormones involved in neural and HPAG axis functioning in a cohort of Chilean adolescents with OD.</p>
</sec>
<sec sec-type="methods" id="sec2">
<label>2</label>
<title>Methods</title>
<sec id="sec3">
<label>2.1</label>
<title>Sample</title>
<p>A cross-sectional study was conducted. Chilean female Caucasian adolescents aged 12&#x2013;25&#x2009;years with diagnosed OD from a private practice center were recruited. All participants were at least 2 years post-menarche. Information was collected on the reason for consultation, educational background, current medications, and drug/alcohol use. According to the patient&#x2019;s condition, OD was diagnosed based on established criteria (<xref ref-type="bibr" rid="ref66">Vigil et al., 2017</xref>): two or more consecutive short or long menstrual cycles (&#x003C;24 or &#x003E;&#x2009;36&#x2009;days) or three or more such cycles within a year; a persistent luteal phase shorter than 9&#x2009;days (determined through mucus symptom charting); serum progesterone levels below 5&#x2009;ng/mL on day 21; or evidence of anovulation by ultrasound. Exclusion criteria included: patients with no OD diagnosis, lack of necessary information for minimum characterization, history of psychiatric hospitalization, major psychiatric diagnosis, hormonal contraceptive use, insulin-sensitizers use, and corticosteroid use. Convenience sampling was employed due to the study&#x2019;s non-randomized nature. The Reproductive Health Research Institute (RHRI) ethics committee approved the study protocol. Informed consent for data analysis was obtained from all participants.</p>
</sec>
<sec id="sec4">
<label>2.2</label>
<title>Clinical evaluation</title>
<p>Each patient underwent a complete clinical evaluation, and a serum basic hormonal profile (BHP) was conducted. The BHP involved testing for FSH, estrogen, thyroid stimulating hormone (TSH), T4 concentration, prolactin, dehydroepiandrosterone sulfate (DHEAS), androstenedione, total testosterone, calculated free testosterone [with albumin and sex hormone binding globulin (SHBG)] and 17-OH-Progesterone. A five-point oral glucose tolerance test with insulin (OGTT-I) was also performed. For menstruating patients, blood samples were collected on days 3, 4, or 5 of the menstrual cycle. For patients with amenorrhea, the BHP was conducted on any convenient day. All samples were collected in a fasting state before 9:00&#x2009;am. The hormonal evaluation and diagnostic assessment of underlying endocrinopathies were performed as follows (<xref ref-type="table" rid="tab1">Table 1</xref>).</p>
<table-wrap position="float" id="tab1">
<label>Table 1</label>
<caption>
<p>Descriptive data for the basic hormonal profile.</p>
</caption>
<table frame="hsides" rules="groups">
<thead>
<tr>
<th align="left" valign="top">Hormone</th>
<th align="left" valign="top">Unit</th>
<th align="center" valign="top">P50</th>
<th align="center" valign="top">IQR</th>
<th align="left" valign="top">Method</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="top">FSH</td>
<td align="left" valign="top">mIU/mL</td>
<td align="center" valign="top">5.2</td>
<td align="center" valign="top">2.77</td>
<td align="left" valign="top">ECLIA</td>
</tr>
<tr>
<td align="left" valign="top">Estrogen</td>
<td align="left" valign="top">pg/mL</td>
<td align="center" valign="top">46.4</td>
<td align="center" valign="top">47.2</td>
<td align="left" valign="top">ECLIA</td>
</tr>
<tr>
<td align="left" valign="top">Total testosterone</td>
<td align="left" valign="top">ng/dL</td>
<td align="center" valign="top">37.8</td>
<td align="center" valign="top">26.2</td>
<td align="left" valign="top">ECLIA</td>
</tr>
<tr>
<td align="left" valign="top">Free testosterone</td>
<td align="left" valign="top">pg/mL</td>
<td align="center" valign="top">4.28</td>
<td align="center" valign="top">4.75</td>
<td align="left" valign="top">Calculated</td>
</tr>
<tr>
<td align="left" valign="top">SHBG</td>
<td align="left" valign="top">nmol/L</td>
<td align="center" valign="top">61.25</td>
<td align="center" valign="top">40.45</td>
<td align="left" valign="top">ECLIA</td>
</tr>
<tr>
<td align="left" valign="top">Androstenedione</td>
<td align="left" valign="top">nmol/L</td>
<td align="center" valign="top">2.5</td>
<td align="center" valign="top">1.25</td>
<td align="left" valign="top">ECLIA</td>
</tr>
<tr>
<td align="left" valign="top">DHEAS</td>
<td align="left" valign="top">ug/dL</td>
<td align="center" valign="top">213.5</td>
<td align="center" valign="top">143</td>
<td align="left" valign="top">ECLIA</td>
</tr>
<tr>
<td align="left" valign="top">Prolactin</td>
<td align="left" valign="top">ng/mL</td>
<td align="center" valign="top">10.5</td>
<td align="center" valign="top">7</td>
<td align="left" valign="top">ECLIA</td>
</tr>
<tr>
<td align="left" valign="top">TSH</td>
<td align="left" valign="top">mIU/L</td>
<td align="center" valign="top">1.89</td>
<td align="center" valign="top">1.31</td>
<td align="left" valign="top">ECLIA</td>
</tr>
<tr>
<td align="left" valign="top">HOMA</td>
<td align="left" valign="top">&#x2013;</td>
<td align="center" valign="top">1.84</td>
<td align="center" valign="top">1.47</td>
<td align="left" valign="top">Calculated</td>
</tr>
<tr>
<td align="left" valign="top">I0&#x002A;G60</td>
<td align="left" valign="top">&#x2013;</td>
<td align="center" valign="top">958.5</td>
<td align="center" valign="top">845.7</td>
<td align="left" valign="top">Calculated</td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<p>Unit, median and interquartile range and method are presented.</p>
</table-wrap-foot>
</table-wrap>
</sec>
<sec id="sec5">
<label>2.3</label>
<title>Insulin and glucose assays</title>
<p>The OGTT-I assay was performed following a 12-h fast. Participants received 75&#x2009;g of glucose, and blood samples were obtained at 0, 30, 60, 90, and 120&#x2009;min to measure glucose and insulin levels. Insulin resistance was diagnosed based on the presence of any of the following criteria: homeostatic model assessment (HOMA) index &#x003E;2.09 (<xref ref-type="bibr" rid="ref9">Burrows et al., 2015</xref>) insulin sensitivity index (ISI) composite &#x003C;4.45 (<xref ref-type="bibr" rid="ref31">Matsuda and DeFronzo, 1999</xref>; <xref ref-type="bibr" rid="ref59">Takahara et al., 2013</xref>) or I0&#x002A;G60&#x2009;&#x003E;&#x2009;1,110 (basal insulin&#x002A; glucose at 60&#x2009;min) (<xref ref-type="bibr" rid="ref13">Contreras et al., 2019</xref>).</p>
</sec>
<sec id="sec6">
<label>2.4</label>
<title>Hyperandrogenemia</title>
<p>Hyperandrogenemia was diagnosed if any of the following criteria were met: total testosterone &#x003E;47&#x2009;ng/dL, free testosterone &#x003E;9&#x2009;pg./mL, DHEAS &#x003E;250&#x2009;&#x03BC;g/dL (<xref ref-type="bibr" rid="ref12">Chen et al., 2021</xref>; <xref ref-type="bibr" rid="ref57">Strauss et al., 2024</xref>), or androstenedione &#x003E;2.8&#x2009;ng/mL (<xref ref-type="bibr" rid="ref64">Vigil et al., 2007</xref>). Total testosterone levels were measured using an enzyme immunoassay, and SHBG and DHEAS levels were measured using an immunoradiometric assay. Free testosterone levels were calculated using established methods that include total testosterone, SHBG, and albumin values (<xref ref-type="bibr" rid="ref63">Vermeulen et al., 1999</xref>). 17-OH-Progesterone was also measured to rule out congenital adrenal hyperplasia (<xref ref-type="bibr" rid="ref23">Hughes, 2009</xref>).</p>
</sec>
<sec id="sec7">
<label>2.5</label>
<title>Hyperprolactinemia</title>
<p>Hyperprolactinemia was diagnosed if basal prolactin levels were&#x2009;&#x003E;&#x2009;25&#x2009;ng/mL (<xref ref-type="bibr" rid="ref29">Majumdar and Mangal, 2013</xref>). Low macro prolactin reactivity reading methods were used to rule out this condition (<xref ref-type="bibr" rid="ref62">Vaishya et al., 2010</xref>). Prolactin levels were measured using immunoradiometric assays.</p>
</sec>
<sec id="sec8">
<label>2.6</label>
<title>Thyroid disorders</title>
<p>Thyroid hormones were determined using Direct Quimioluminiscence. Primary hypothyroidism was diagnosed if TSH values were&#x2009;&#x003E;&#x2009;10 &#x03BC;IU/mL. Subclinical hypothyroidism (SCH) was diagnosed when basal TSH level was &#x003E;5 &#x03BC;IU/mL and T4 values were within a normal range (<xref ref-type="bibr" rid="ref16">Dhillon-Smith et al., 2020</xref>).</p>
</sec>
<sec id="sec9">
<label>2.7</label>
<title>Characterization of personal growth</title>
<p>At the time of the first hormonal measurement and within the first 30&#x2009;days following OD diagnosis, participants went through a personal growth assessment. This evaluation was designed to account for both self-development aspects and consider interpersonal relationships. It included the following instruments:</p>
<p>Profile of mood states (POMS) (<xref ref-type="bibr" rid="ref39">Norcross et al., 1984</xref>): a 65-item scale measuring 6 different dimensions of mood states during the last 2 weeks (scores vary by subscale). It includes tension or anxiety, anger or hostility, vigor, fatigue or inertia, depression, and confusion.</p>
<p>Self-concept clarity scale (SCC) (<xref ref-type="bibr" rid="ref11">Campbell et al., 1996</xref>): a 12-item Likert scale measuring self-concept clarity (scores range from 12 to 60). Self-Concept Clarity references a structural aspect of the self-concept: the extent to which self-beliefs are clearly and confidently defined, internally consistent, and stable.</p>
<p>Sense of coherence questionnaire (SOC-13) (<xref ref-type="bibr" rid="ref3">Antonovsky, 1993</xref>): a 13-item Likert scale assessing sense of coherence (scores range from 13 to 91). Sense of coherence describes how an individual perceives the world as comprehensible, manageable, and meaningful.</p>
<p>Rosenberg self-esteem scale (RSES) (<xref ref-type="bibr" rid="ref47">Rosenberg, 1965</xref>): a 10-item scale measuring self-esteem (scores range from 0 to 30). It is defined as one&#x2019;s overall sense of worthiness as a person.</p>
<p>Frost multidimensional perfectionism scale (FMPS) (<xref ref-type="bibr" rid="ref19">Frost et al., 1990</xref>): a 35-item Likert scale assessing different dimensions of perfectionism (scores vary by subscale). It encompasses concern over mistakes, doubts about actions, personal standards, parental expectations, parental criticism, and organization.</p>
<p>Self-control scale (SCS) (<xref ref-type="bibr" rid="ref60">Tangney et al., 2004</xref>): a 36-item scale measuring self-control across various domains (scores vary by subscale). It can be defined as the capacity to change and adapt the self to produce a better, more optimal fit between the self and the world. Central to this concept is the ability to override one&#x2019;s inner and immediate response, as well as to interrupt undesired behavioral tendencies and refrain from acting on them.</p>
</sec>
<sec id="sec10">
<label>2.8</label>
<title>Statistical analysis</title>
<p>The Shapiro&#x2013;Wilk test was employed to assess the normality of each dataset. Descriptive statistics were reported as mean [standard deviation (SD)] for parametric data or median [interquartile range (IQR)] for non-parametric data. Categorical variables were presented as absolute counts and percentages (%). A <italic>t</italic>-test was used to compare continuous data, while the Mann&#x2013;Whitney&#x2019;s <italic>U-</italic>test was utilized for non-parametric data. Fisher&#x2019;s exact test was employed for the comparison of categorical datasets. ANOVA and ANCOVA methods were used for variance analysis. For multivariate analysis, multiple linear and logistic regressions were considered. Pearson or Spearman correlation indices were regarded as appropriate. A <italic>p</italic>-value &#x003C;0.05 was considered statistically significant. A power analysis was not conducted due to the exploratory nature of this study. Statistical analyses were conducted using Stata v12.0 (StataCorp, TX, United States).</p>
</sec>
</sec>
<sec sec-type="results" id="sec11">
<label>3</label>
<title>Results</title>
<p>The initial sample consisted of a total of 121 patients who completed the evaluation. After applying the exclusion criteria, the final sample comprised 117 patients with a median age of 18&#x2009;years (IQR: 6&#x2009;years). Mean BMI was 22.97 (IQR: 4.86). Regarding BMI classification, 59.4% were categorized as normal weight, 31.3% overweight, 6.3% underweight, and 3.1% obese. Menstrual Irregularity was the most common presenting complaint (51.3%). Other reported symptoms included acne (43.8%), weight gain (37.5%), and dysmenorrhea (18.8%). Regarding diagnosis, insulin resistance (55.5%) (IR) and hyperandrogenemia (54.8%) were the most frequent diagnoses. Additionally, subclinical hypothyroidism (29.6%), hyperprolactinemia (10.5%), (7.0%), and primary hypothyroidism (2.5%) were documented. These findings align with the most frequent causes of ovulatory dysfunction (OD) (<xref ref-type="bibr" rid="ref36">Munro et al., 2022</xref>). Descriptive data for the BHP results can be consulted in <xref ref-type="table" rid="tab1">Table 1</xref>.</p>
<p>According to the POMS questionnaire, a significant portion of the sample exhibited elevated scores for tension (71.25%), confusion (62.5%), fatigue (58.22%), depression (52.6%), and aggressiveness (33.75%). Among those participants who exhibited altered scores for depression, a significantly higher TSH value was observed (5.23 mIU/L vs. 1.81 mIU/L; <italic>p</italic> =&#x2009;0.001) (<xref ref-type="fig" rid="fig1">Figure 1</xref>). Compared to reference data, adolescents with OD displayed lower self-concept clarity and self-esteem scores (<xref ref-type="bibr" rid="ref20">Gutierrez, 2015</xref>). The summary of other considered scales (SCC, SOC-13, RSES, FMPS, SCS), next to reference data, can be found in <xref ref-type="table" rid="tab2">Table 2</xref>.</p>
<fig position="float" id="fig1">
<label>Figure 1</label>
<caption>
<p><bold>(A)</bold> Distribution of scores for depression and tension. The orange line indicates the mean scores of the study participants, while the grey line denotes the mean scores from reference data for the general population. <bold>(B)</bold> Among participants exhibiting elevated depression scores, significantly higher thyroid-stimulating hormone (TSH) levels were observed.</p>
</caption>
<graphic xlink:href="fpsyg-15-1433437-g001.tif"/>
</fig>
<table-wrap position="float" id="tab2">
<label>Table 2</label>
<caption>
<p>Summary of scores in the studied population vs. normative reference for age range.</p>
</caption>
<table frame="hsides" rules="groups">
<thead>
<tr>
<th align="left" valign="top">Scale</th>
<th align="left" valign="top">Evaluated dimention</th>
<th align="center" valign="top">Mean (X), standard deviation (SD) (reference sample)</th>
<th align="left" valign="top">Mean (X), standard deviation (SD) (study sample) <italic>N</italic>&#x2009;=&#x2009;117; 12&#x2013;25&#x2009;years old</th>
<th align="left" valign="top">References</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="middle" rowspan="2">Self-concept clarity scale (SCC)</td>
<td align="left" valign="middle" rowspan="2">Structural aspect of the self-concept: the extent to which self-beliefs are clearly and confidently defined, internally consistent and stable.</td>
<td align="center" valign="middle">12&#x2013;18&#x2009;years old (X&#x2009;=&#x2009;34.68, SD&#x2009;=&#x2009;7.05)</td>
<td align="left" valign="middle" rowspan="2">X&#x2009;=&#x2009;40.3, SD&#x2009;=&#x2009;10.3</td>
<td align="left" valign="middle" rowspan="2"><xref ref-type="bibr" rid="ref14">Darcourt (2015)</xref> and <xref ref-type="bibr" rid="ref20">Gutierrez (2015)</xref></td>
</tr>
<tr>
<td align="center" valign="middle">18&#x2013;34 years old (X&#x2009;=&#x2009;37.07, SD&#x2009;=&#x2009;9.58)</td>
</tr>
<tr>
<td align="left" valign="middle">Sense of coherence questionnaire (SOC-13)</td>
<td align="left" valign="middle">Describes how an individual perceives the world as comprehensible, manageable, and meaningful.</td>
<td align="center" valign="middle">X&#x2009;=&#x2009;53.6, SD&#x2009;=&#x2009;11.2</td>
<td align="left" valign="middle">X&#x2009;=&#x2009;53.6, SD&#x2009;=&#x2009;5.8</td>
<td align="left" valign="middle">
<xref ref-type="bibr" rid="ref1">&#x00C1;lvarez Rodr&#x00ED;guez (2022)</xref>
</td>
</tr>
<tr>
<td align="left" valign="middle" rowspan="2">Rosenberg self-esteem scale (RSES)</td>
<td align="left" valign="middle" rowspan="2">One&#x2019;s overall sense of worthiness as a person.</td>
<td align="center" valign="middle">18&#x2013;25&#x2009;years old (X&#x2009;=&#x2009;19.67, SD&#x2009;=&#x2009;6.63)</td>
<td align="left" valign="middle" rowspan="2">X&#x2009;=&#x2009;19.9, SD&#x2009;=&#x2009;5.2</td>
<td align="left" valign="middle" rowspan="2">
<xref ref-type="bibr" rid="ref53">Sinclair et al. (2010)</xref>
</td>
</tr>
<tr>
<td align="center" valign="middle">26&#x2013;35&#x2009;years old (X&#x2009;=&#x2009;22.28, SD&#x2009;=&#x2009;5.66)</td>
</tr>
<tr>
<td align="left" valign="middle" rowspan="6">Frost multidimensional perfectionism scale (FMPS)</td>
<td align="left" valign="middle" rowspan="6">It encompasses concern over mistakes, doubts about actions, personal standards, parental expectations, parental criticism, and organization.</td>
<td align="center" valign="middle">Parental criticism (X&#x2009;=&#x2009;7.3, SD&#x2009;=&#x2009;3.5).</td>
<td align="left" valign="middle">Parental criticism (X&#x2009;=&#x2009;8.23, SD&#x2009;=&#x2009;3.91)</td>
<td align="left" valign="middle" rowspan="6">
<xref ref-type="bibr" rid="ref30">Mandiola et al. (2022)</xref>
</td>
</tr>
<tr>
<td align="center" valign="middle">Parental expectations (X&#x2009;=&#x2009;13.6, SD =4.7)</td>
<td align="left" valign="middle">Parental expectations (X&#x2009;=&#x2009;12.68, SD 4.49)</td>
</tr>
<tr>
<td align="center" valign="middle">Parental standards (X&#x2009;=&#x2009;23.4, SD =5.2)</td>
<td align="left" valign="middle">Parental standards (X&#x2009;=&#x2009;22.36, SD&#x2009;=&#x2009;5.68)</td>
</tr>
<tr>
<td align="center" valign="middle">Concern over mistakes (X&#x2009;=&#x2009;22.4, SD&#x2009;=&#x2009;7.3)</td>
<td align="left" valign="middle">Concern over mistakes (X&#x2009;=&#x2009;20.5, SD&#x2009;=&#x2009;8.28)</td>
</tr>
<tr>
<td align="center" valign="middle">Doubts about actions (X&#x2009;=&#x2009;12.4, SD&#x2009;=&#x2009;4.3).</td>
<td align="left" valign="middle">Doubts about actions (X&#x2009;=&#x2009;11.63, SD&#x2009;=&#x2009;3.90)</td>
</tr>
<tr>
<td align="center" valign="middle">Organization (X&#x2009;=&#x2009;23.6, SD&#x2009;=&#x2009;4.2).</td>
<td align="left" valign="middle">Organization (X&#x2009;=&#x2009;23.06, SD&#x2009;=&#x2009;5.56)</td>
</tr>
<tr>
<td align="left" valign="middle">Self-control scale (SCS)</td>
<td align="left" valign="middle">The capacity to change and adapt the self to produce a better, more optimal fit between the self and the world. Central to this concept is the ability to override one&#x2019;s inner and immediate response, as well as to interrupt undesired behavioral tendencies and refrain from acting on them.</td>
<td align="center" valign="middle">X&#x2009;=&#x2009;114.47, SD =18.81</td>
<td align="left" valign="middle">X&#x2009;=&#x2009;117.41, SD&#x2009;=&#x2009;21.52</td>
<td align="left" valign="middle">
<xref ref-type="bibr" rid="ref61">Tangney et al. (2018)</xref>
</td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<p>The following domains were considered: Self-concept clarity, sense of coherence, self-esteem, perfectionism and self-control.</p>
</table-wrap-foot>
</table-wrap>
<p>When multivariate analysis was considered, logistic regressions revealed positive correlations between the complaint of acne and scores for concern about mistakes (<italic>r</italic> =&#x2009;0.217, <italic>p</italic> =&#x2009;0.009), doubts about actions (<italic>r</italic> =&#x2009;0.251, <italic>p</italic> =&#x2009;0.007), tension (<italic>r</italic> =&#x2009;0.296, <italic>p</italic> =&#x2009;0.02), confusion (<italic>r</italic> =&#x2009;0.279, <italic>p</italic> =&#x2009;0.003), depression (<italic>r</italic> =&#x2009;0.343, <italic>p</italic> =&#x2009;0.001), and anger (<italic>r</italic> =&#x2009;0.302, <italic>p</italic> =&#x2009;0.001). Metrorrhagia was positively correlated with the level of fatigue (<italic>r</italic> =&#x2009;0.225; <italic>p</italic> =&#x2009;0.17). Weight gain complaints were negatively correlated with self-esteem (<italic>r</italic> =&#x2009;&#x2212;0.231, <italic>p</italic> =&#x2009;0.013) and personal standards (<italic>r</italic> =&#x2009;&#x2212;0.255, <italic>p</italic> =&#x2009;0.008). Considering hormonal measurements, self-esteem showed negative correlations with DHEAS (<italic>r</italic> =&#x2009;&#x2212; 0.224; <italic>p</italic> =&#x2009;0.026), insulin (<italic>r</italic> =&#x2009;&#x2212;0.191; <italic>p</italic> =&#x2009;0.049), and glucose (<italic>r</italic> =&#x2009;&#x2212;0.249; <italic>p</italic> =&#x2009;0.010) levels, even after adjusting for BMI (<xref ref-type="fig" rid="fig2">Figure 2</xref>). Fatigue scores were positively correlated with prolactin (<italic>r</italic> =&#x2009;0.232; <italic>p</italic> =&#x2009;0.20). When variance analysis was considered, it was seen that the score for tension increased with higher levels of TSH (coef&#x2009;=&#x2009;1.198; <italic>p</italic> =&#x2009;0.045) and free testosterone (coef&#x2009;=&#x2009;194.5; <italic>p</italic> =&#x2009;0.011). Depression scores increased with higher levels of SHBG (coef =&#x2009;0.2398; <italic>p</italic> =&#x2009;0.002) and similarly with DHEA-S (coef&#x2009;=&#x2009;0.0867; <italic>p</italic> =&#x2009;0.011). Aggressiveness scores showed an increase with higher serum levels of TSH (coef&#x2009;=&#x2009;1.818; <italic>p</italic> =&#x2009;0.004), DHEA-S (coef&#x2009;=&#x2009;0.0515; <italic>p</italic> =&#x2009;0.001), Free Testosterone (coef&#x2009;=&#x2009;269.1; <italic>p</italic> =&#x2009;0.001), and SHBG (coef&#x2009;=&#x2009;0.1231; <italic>p</italic> =&#x2009;0.001). Conversely, aggressiveness scores decrease with higher levels of estradiol (coef&#x2009;=&#x2009;&#x2212;0.0648; <italic>p</italic> =&#x2009;0.001).</p>
<fig position="float" id="fig2">
<label>Figure 2</label>
<caption>
<p>Correlation between dehydroepiandrosterone sulfate (DHEAS) levels and self-esteem scores. Higher levels of DHEAS were associated with lower self-esteem scores (<italic>P</italic> =&#x2009;0.011; <italic>R</italic> =&#x2009;&#x2212;0.224).</p>
</caption>
<graphic xlink:href="fpsyg-15-1433437-g002.tif"/>
</fig>
</sec>
<sec sec-type="discussion" id="sec12">
<label>4</label>
<title>Discussion</title>
<p>This study investigated the associations between neuroactive hormone levels, personal growth domains, and mood states in adolescents with ovulatory dysfunction (OD). Mood assessment revealed a high prevalence of tension, confusion, fatigue, depression, and aggressiveness within the study population (<xref ref-type="bibr" rid="ref51">Shahid et al., 2011</xref>). Typical symptoms of OD, such as acne and weight gain, were correlated with scores for concern about mistakes, doubts about actions, tension, confusion, lower self-esteem, and personal standards. These results suggest that adolescents with OD may present a profile of personal growth dimensions different from that of the general population, which may be associated with hormonal dysfunctions.</p>
<p>Hyperandrogenism was a common diagnosis in this population (54.8%). Serum levels of androgens, like DHEAS and free testosterone, negatively correlated with self-esteem and positively correlated with depression, tension, and aggression. This aligns with the established role of androgens in modulating CNS function throughout life, particularly during adolescence (<xref ref-type="bibr" rid="ref26">Laube et al., 2020</xref>). This action has functional and behavioral implications. Studies have shown that the normal increase in testosterone during 2&#x2009;years of pubertal maturation was associated with increased activity in the amygdala in boys and girls. This was associated with increased levels of withdrawal temperament, consistent with an increase in threat sensitivity (<xref ref-type="bibr" rid="ref41">Peters et al., 2015</xref>). Furthermore, a recent study shows that testosterone correlates with lower resting state functional connectivity between the amygdala and right superior frontal gyrus, but only in women (<xref ref-type="bibr" rid="ref24">Kogler et al., 2023</xref>).</p>
<p>Up to 55% of participants exhibited IR, a condition usually associated with weight gain (<xref ref-type="bibr" rid="ref64">Vigil et al., 2007</xref>). Weight gain was correlated with lower self-esteem and personal standards in our population. Notably, multivariate analysis showed that insulin and glucose were associated with lower self-esteem scores, even after adjusting for BMI. Existing research supports this link, demonstrating an increased risk of depression in individuals with IR, which persists when adjusted for BMI or age (<xref ref-type="bibr" rid="ref48">Santoro et al., 1999</xref>). This would be consistent with animal models, where inactivation of the insulin receptor in the hypothalamus has been shown to result in systemic IR, dyslipidemia, and depressive-like behavior (<xref ref-type="bibr" rid="ref45">Randolph Jr et al., 2011</xref>). Additionally, studies using functional magnetic resonance imaging in patients with PCOS and IR revealed alterations in limbic system activation during emotional tasks, which normalized after metformin treatment (<xref ref-type="bibr" rid="ref42">Pike et al., 2009</xref>).</p>
<p>Other common diagnoses were subclinical hypothyroidism, primary hypothyroidism, and hyperprolactinemia. Our results show that patient with altered scores for depression exhibited higher TSH levels. This is coherent with the well-established relationship between thyroid disorders and mood alterations (<xref ref-type="bibr" rid="ref7">Bauer et al., 2003</xref>, <xref ref-type="bibr" rid="ref6">2008</xref>; <xref ref-type="bibr" rid="ref54">Singh and Sundaresh, 2022</xref>). Regarding hyperprolactinemia, our results show a positive correlation between prolactin levels and fatigue scores. Several studies have indicated that patients with hyperprolactinemia are more likely to experience depression, anxiety, and hostility (<xref ref-type="bibr" rid="ref18">Fava et al., 1983</xref>; <xref ref-type="bibr" rid="ref27">Liao and Bai, 2014</xref>; <xref ref-type="bibr" rid="ref2">An et al., 2016</xref>). Even though there is still a lack of understanding of the mechanism that rules this relationship, prolactin can act on different brain regions, including those involved in neural growth, development, sleep, learning, and memory (<xref ref-type="bibr" rid="ref10">Cabrera-Reyes et al., 2017</xref>).</p>
<p>It is also important to acknowledge the potential impact of body image concerns, often triggered by symptoms like hirsutism and acne, on self-esteem and emotional wellbeing (<xref ref-type="bibr" rid="ref69">Whitlock et al., 2006</xref>). Importantly, acne and weight gain complaints were correlated with tension, depression, and aggression. Studies have shown a positive correlation between body image dissatisfaction and symptoms of anxiety and depression in women (<xref ref-type="bibr" rid="ref38">Nilsen et al., 2007</xref>). Therefore, factors associated with body image development may also contribute to the observed psychological outcomes.</p>
<p>Conversely, higher estradiol levels were associated with lower aggression scores. The fact that serotonergic transmission in limbic areas and emotional functions is potentiated by estrogen strongly suggests a role of the latter in mood and emotional states in women (<xref ref-type="bibr" rid="ref68">Wharton et al., 2012</xref>). Moreover, through its effects on PFC and limbic regions (such as the nucleus accumbens), estrogen influences emotional and motivational behaviors, for example, by decreasing impulsive behaviors (<xref ref-type="bibr" rid="ref37">Nicola, 2007</xref>; <xref ref-type="bibr" rid="ref55">Smith et al., 2014</xref>). This suggests a potential protective role of estrogen in modulating aggressive behavior (<xref ref-type="bibr" rid="ref15">Del R&#x00ED;o et al., 2018</xref>).</p>
<p>In summary, our findings suggest that hormonal imbalances in adolescents with OD are associated with personal growth and psychological wellbeing domains. Among the limitations of the present study is its cross-sectional nature. Since adolescence is a period of development, longitudinal studies that follow the dimensions studied over time are necessary. Further research is needed to establish causal relationships between the variables considered. In this sense, other aspects, such as early life experiences, previous hormonal contraceptive use, and familiar history of hormonal or psychological conditions, should also be considered. This work could allow a greater understanding of the mechanisms underlying hormonal effects on CNS development, highlighting the importance of considering endocrinological functioning when assessing personal growth in adolescents.</p>
</sec>
</body>
<back>
<sec sec-type="data-availability" id="sec13">
<title>Data availability statement</title>
<p>Due to legal obligations regarding to patient confidentiality and participant privacy, data will be only available if it is requested by qualified researchers and depending on the third party approval. For inquiries about dataset please contact the corresponding author.</p>
</sec>
<sec sec-type="ethics-statement" id="sec14">
<title>Ethics statement</title>
<p>The studies involving humans were approved by the Reproductive Health Research Institute Ethics Committee, Santiago, RM, Chile. The studies were conducted in accordance with the local legislation and institutional requirements. Written informed consent for participation in this study was provided by the participants' legal guardians/next of kin.</p>
</sec>
<sec sec-type="author-contributions" id="sec15">
<title>Author contributions</title>
<p>JR: Writing &#x2013; review &#x0026; editing, Writing &#x2013; original draft, Visualization, Supervision, Methodology, Conceptualization. VT: Writing &#x2013; original draft, Investigation, Formal analysis, Data curation. HS: Writing &#x2013; review &#x0026; editing, Investigation, Formal analysis, Data curation. PV: Writing &#x2013; review &#x0026; editing, Visualization, Supervision, Resources, Funding acquisition, Conceptualization.</p>
</sec>
<sec sec-type="funding-information" id="sec16">
<title>Funding</title>
<p>The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. This work was funded by the RHRI Research (Grant No: 012024).</p>
</sec>
<sec sec-type="COI-statement" id="sec17">
<title>Conflict of interest</title>
<p>The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.</p>
</sec>
<sec sec-type="disclaimer" id="sec18">
<title>Publisher&#x2019;s note</title>
<p>All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.</p>
</sec>
<ref-list>
<title>References</title>
<ref id="ref1">
<citation citation-type="other"><person-group person-group-type="author"><name><surname>&#x00C1;lvarez Rodr&#x00ED;guez</surname> <given-names>M. E.</given-names></name></person-group> (<year>2022</year>). <source>Validaci&#x00F3;n de la escala sentido de coherencia-13 en estudiantes de una universidad de la ciudad de Concepci&#x00F3;n, 2020</source>. Tesis para optar al grado de mag&#x00ED;ster en enfermer&#x00ED;a, Universidad de Concepci&#x00F3;n Chile. Available at:  <ext-link xlink:href="http://repositorio.udec.cl/jspui/handle/11594/10295" ext-link-type="uri">http://repositorio.udec.cl/jspui/handle/11594/10295</ext-link></citation>
</ref>
<ref id="ref2">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>An</surname> <given-names>F.-R.</given-names></name> <name><surname>Yang</surname> <given-names>R.</given-names></name> <name><surname>Wang</surname> <given-names>Z. M.</given-names></name> <name><surname>Ungvari</surname> <given-names>G. S.</given-names></name> <name><surname>Ng</surname> <given-names>C. H.</given-names></name> <name><surname>Chiu</surname> <given-names>H. F. K.</given-names></name> <etal/></person-group>. (<year>2016</year>). <article-title>Hyperprolactinemia, prolactin-related side effects and quality of life in Chinese psychiatric patients</article-title>. <source>Compr. Psychiatry</source> <volume>71</volume>, <fpage>71</fpage>&#x2013;<lpage>76</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.comppsych.2016.08.009</pub-id>, PMID: <pub-id pub-id-type="pmid">27639124</pub-id></citation>
</ref>
<ref id="ref3">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Antonovsky</surname> <given-names>A.</given-names></name></person-group> (<year>1993</year>). <article-title>The structure and properties of the sense of coherence scale</article-title>. <source>Soc. Sci. Med.</source> <volume>36</volume>, <fpage>725</fpage>&#x2013;<lpage>733</lpage>. doi: <pub-id pub-id-type="doi">10.1016/0277-9536(93)90033-Z</pub-id></citation>
</ref>
<ref id="ref4">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Arnold</surname> <given-names>A.</given-names></name></person-group> (<year>1985</year>). <article-title>Organizational and activational effects of sex steroids on brain and behavior: a reanalysis</article-title>. <source>Horm. Behav.</source> <volume>19</volume>, <fpage>469</fpage>&#x2013;<lpage>498</lpage>. doi: <pub-id pub-id-type="doi">10.1016/0018-506x(85)90042-x</pub-id>, PMID: <pub-id pub-id-type="pmid">3910535</pub-id></citation>
</ref>
<ref id="ref5">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Azcoitia</surname> <given-names>I.</given-names></name> <name><surname>Mendez</surname> <given-names>P.</given-names></name> <name><surname>Garcia-Segura</surname> <given-names>L. M.</given-names></name></person-group> (<year>2021</year>). <article-title>Aromatase in the human brain</article-title>. <source>Androgens</source> <volume>2</volume>, <fpage>189</fpage>&#x2013;<lpage>202</lpage>. doi: <pub-id pub-id-type="doi">10.1089/andro.2021.0007</pub-id></citation>
</ref>
<ref id="ref6">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Bauer</surname> <given-names>M.</given-names></name> <name><surname>Goetz</surname> <given-names>T.</given-names></name> <name><surname>Glenn</surname> <given-names>T.</given-names></name> <name><surname>Whybrow</surname> <given-names>P. C.</given-names></name></person-group> (<year>2008</year>). <article-title>The thyroid-brain interaction in thyroid disorders and mood disorders</article-title>. <source>J. Neuroendocrinol.</source> <volume>20</volume>, <fpage>1101</fpage>&#x2013;<lpage>1114</lpage>. doi: <pub-id pub-id-type="doi">10.1111/j.1365-2826.2008.01774.x</pub-id></citation>
</ref>
<ref id="ref7">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Bauer</surname> <given-names>M.</given-names></name> <name><surname>London</surname> <given-names>E. D.</given-names></name> <name><surname>Silverman</surname> <given-names>D. H.</given-names></name> <name><surname>Rasgon</surname> <given-names>N.</given-names></name> <name><surname>Kirchheiner</surname> <given-names>J.</given-names></name> <name><surname>Whybrow</surname> <given-names>P. C.</given-names></name></person-group> (<year>2003</year>). <article-title>Thyroid, brain, and mood modulation in affective disorder: insights from molecular research and functional brain imaging</article-title>. <source>Pharmacopsychiatry</source> <volume>36</volume>, <fpage>S215</fpage>&#x2013;<lpage>S221</lpage>. doi: <pub-id pub-id-type="doi">10.1055/s-2003-45133</pub-id>, PMID: <pub-id pub-id-type="pmid">14677082</pub-id></citation>
</ref>
<ref id="ref8">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Bloch</surname> <given-names>M.</given-names></name> <name><surname>Daly</surname> <given-names>R. C.</given-names></name> <name><surname>Rubinow</surname> <given-names>D. R.</given-names></name></person-group> (<year>2003</year>). <article-title>Endocrine factors in the etiology of postpartum depression</article-title>. <source>Compr. Psychiatry</source> <volume>44</volume>, <fpage>234</fpage>&#x2013;<lpage>246</lpage>. doi: <pub-id pub-id-type="doi">10.1016/s0010-440x(03)00034-8</pub-id></citation>
</ref>
<ref id="ref9">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Burrows</surname> <given-names>R.</given-names></name> <name><surname>Correa-Burrows</surname> <given-names>P.</given-names></name> <name><surname>Reyes</surname> <given-names>M.</given-names></name> <name><surname>Blanco</surname> <given-names>E.</given-names></name> <name><surname>Albala</surname> <given-names>C.</given-names></name> <name><surname>Gahagan</surname> <given-names>S.</given-names></name></person-group> (<year>2015</year>). <article-title>Healthy Chilean adolescents with HOMA-IR &#x2265; 2.6 have increased Cardiometabolic risk: association with genetic, biological, and environmental factors</article-title>. <source>J. Diabetes Res.</source> <volume>2015</volume>, <fpage>1</fpage>&#x2013;<lpage>8</lpage>. doi: <pub-id pub-id-type="doi">10.1155/2015/783296</pub-id>, PMID: <pub-id pub-id-type="pmid">26273675</pub-id></citation>
</ref>
<ref id="ref10">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Cabrera-Reyes</surname> <given-names>E. A.</given-names></name> <name><surname>Lim&#x00F3;n-Morales</surname> <given-names>O.</given-names></name> <name><surname>Rivero-Segura</surname> <given-names>N. A.</given-names></name> <name><surname>Camacho-Arroyo</surname> <given-names>I.</given-names></name> <name><surname>Cerb&#x00F3;n</surname> <given-names>M.</given-names></name></person-group> (<year>2017</year>). <article-title>Prolactin function and putative expression in the brain</article-title>. <source>Endocrine</source> <volume>57</volume>, <fpage>199</fpage>&#x2013;<lpage>213</lpage>. doi: <pub-id pub-id-type="doi">10.1007/s12020-017-1346-x</pub-id>, PMID: <pub-id pub-id-type="pmid">28634745</pub-id></citation>
</ref>
<ref id="ref11">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Campbell</surname> <given-names>J. D.</given-names></name> <name><surname>Trapnell</surname> <given-names>P. D.</given-names></name> <name><surname>Heine</surname> <given-names>S. J.</given-names></name> <name><surname>Katz</surname> <given-names>I. M.</given-names></name> <name><surname>Lavallee</surname> <given-names>L. F.</given-names></name> <name><surname>Lehman</surname> <given-names>D. R.</given-names></name></person-group> (<year>1996</year>). <article-title>Self-concept clarity: measurement, personality correlates, and cultural boundaries</article-title>. <source>J. Pers. Soc. Psychol.</source> <volume>70</volume>, <fpage>141</fpage>&#x2013;<lpage>156</lpage>. doi: <pub-id pub-id-type="doi">10.1037/0022-3514.70.1.141</pub-id></citation>
</ref>
<ref id="ref12">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Chen</surname> <given-names>F.</given-names></name> <name><surname>Chen</surname> <given-names>M.</given-names></name> <name><surname>Zhang</surname> <given-names>W.</given-names></name> <name><surname>Yin</surname> <given-names>H.</given-names></name> <name><surname>Chen</surname> <given-names>G.</given-names></name> <name><surname>Huang</surname> <given-names>Q.</given-names></name> <etal/></person-group>. (<year>2021</year>). <article-title>Comparison of the efficacy of different androgens measured by LC-MS/MS in representing hyperandrogenemia and an evaluation of adrenal-origin androgens with a dexamethasone suppression test in patients with PCOS</article-title>. <source>J. Ovarian Res.</source> <volume>14</volume>:<fpage>32</fpage>. doi: <pub-id pub-id-type="doi">10.1186/s13048-021-00781-5</pub-id>, PMID: <pub-id pub-id-type="pmid">33583431</pub-id></citation>
</ref>
<ref id="ref13">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Contreras</surname> <given-names>P. H.</given-names></name> <name><surname>Salgado</surname> <given-names>A. M.</given-names></name> <name><surname>Bernal</surname> <given-names>Y. A.</given-names></name> <name><surname>Vigil</surname> <given-names>P.</given-names></name></person-group> (<year>2019</year>). <article-title>A simple and improved predictor of insulin resistance extracted from the Oral glucose tolerance test: the I0&#x002A;G60</article-title>. <source>J. Endocr. Soc.</source> <volume>3</volume>, <fpage>1154</fpage>&#x2013;<lpage>1166</lpage>. doi: <pub-id pub-id-type="doi">10.1210/js.2018-00342</pub-id>, PMID: <pub-id pub-id-type="pmid">31139762</pub-id></citation>
</ref>
<ref id="ref14">
<citation citation-type="book"><person-group person-group-type="author"><name><surname>Darcourt</surname> <given-names>A.</given-names></name></person-group> (<year>2015</year>). <source>Claridad del autoconcepto, autoestima, auto-reflexi&#x00F3;n e insight en adultos j&#x00F3;venes residentes en lima</source>. <publisher-loc>Lima</publisher-loc>: <publisher-name>Pontificia Universidad Cat&#x00F3;lica del Per&#x00FA;</publisher-name>.</citation>
</ref>
<ref id="ref15">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Del R&#x00ED;o</surname> <given-names>J. P.</given-names></name> <name><surname>Alliende</surname> <given-names>M.</given-names></name> <name><surname>Molina</surname> <given-names>N.</given-names></name> <name><surname>Serrano</surname> <given-names>F.</given-names></name> <name><surname>Molina</surname> <given-names>S.</given-names></name> <name><surname>Vigil</surname> <given-names>P.</given-names></name></person-group> (<year>2018</year>). <article-title>Steroid hormones and their action in women&#x2019;s brains: the importance of hormonal balance</article-title>. <source>Front. Public Health</source> <volume>6</volume>:<fpage>141</fpage>. doi: <pub-id pub-id-type="doi">10.3389/fpubh.2018.00141</pub-id></citation>
</ref>
<ref id="ref16">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Dhillon-Smith</surname> <given-names>R. K.</given-names></name> <name><surname>Tobias</surname> <given-names>A.</given-names></name> <name><surname>Smith</surname> <given-names>P. P.</given-names></name> <name><surname>Middleton</surname> <given-names>L. J.</given-names></name> <name><surname>Sunner</surname> <given-names>K. K.</given-names></name> <name><surname>Baker</surname> <given-names>K.</given-names></name> <etal/></person-group>. (<year>2020</year>). <article-title>The prevalence of thyroid dysfunction and autoimmunity in women with history of miscarriage or subfertility</article-title>. <source>J. Clin. Endocrinol. Metab.</source> <volume>105</volume>, <fpage>2667</fpage>&#x2013;<lpage>2677</lpage>. doi: <pub-id pub-id-type="doi">10.1210/clinem/dgaa302</pub-id></citation>
</ref>
<ref id="ref17">
<citation citation-type="book"><person-group person-group-type="author"><name><surname>Erikson</surname> <given-names>E. H.</given-names></name></person-group> (<year>1968</year>). <source>Identity: youth and crisis</source>. <publisher-loc>New York, NY</publisher-loc>: <publisher-name>WW Norton and Company</publisher-name>.</citation>
</ref>
<ref id="ref18">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Fava</surname> <given-names>M.</given-names></name> <name><surname>Fava</surname> <given-names>G. A.</given-names></name> <name><surname>Kellner</surname> <given-names>R.</given-names></name> <name><surname>Buckman</surname> <given-names>M. T.</given-names></name> <name><surname>Lisansky</surname> <given-names>J.</given-names></name> <name><surname>Serafini</surname> <given-names>E.</given-names></name> <etal/></person-group>. (<year>1983</year>). <article-title>Psychosomatic aspects of hyperprolactinemia</article-title>. <source>Psychother. Psychosom.</source> <volume>40</volume>, <fpage>257</fpage>&#x2013;<lpage>262</lpage>. doi: <pub-id pub-id-type="doi">10.1159/000287773</pub-id></citation>
</ref>
<ref id="ref19">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Frost</surname> <given-names>R. O.</given-names></name> <name><surname>Marten</surname> <given-names>P.</given-names></name> <name><surname>Lahart</surname> <given-names>C.</given-names></name> <name><surname>Rosenblate</surname> <given-names>R.</given-names></name></person-group> (<year>1990</year>). <article-title>The dimensions of perfectionism</article-title>. <source>Cogn. Ther. Res.</source> <volume>14</volume>, <fpage>449</fpage>&#x2013;<lpage>468</lpage>. doi: <pub-id pub-id-type="doi">10.1007/BF01172967</pub-id></citation>
</ref>
<ref id="ref20">
<citation citation-type="book"><person-group person-group-type="author"><name><surname>Gutierrez</surname> <given-names>G.</given-names></name></person-group> (<year>2015</year>). <source>Claridad del autoconcepto, autoestima y bienestar psicol&#x00F3;gico en adolescentes de zonas urbano marginales</source>. <publisher-loc>Lima</publisher-loc>: <publisher-name>Pontificia Universidad Cat&#x00F3;lica del Per&#x00FA;</publisher-name>.</citation>
</ref>
<ref id="ref21">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Guzm&#x00E1;n-Montiel</surname> <given-names>R.</given-names></name></person-group> (<year>2019</year>). <article-title>The inter-processual self: towards a personalist virtue ethics proposal for human agency</article-title>. <source>Rev. Empresa y Hum.</source> <volume>22</volume>, <fpage>117</fpage>&#x2013;<lpage>121</lpage>. doi: <pub-id pub-id-type="doi">10.15581/015.22.37934</pub-id></citation>
</ref>
<ref id="ref22">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Hampson</surname> <given-names>E.</given-names></name></person-group> (<year>1990</year>). <article-title>Estrogen-related variations in human spatial and articulatory-motor skills</article-title>. <source>Psychoneuroendocrinology</source> <volume>15</volume>, <fpage>97</fpage>&#x2013;<lpage>111</lpage>. doi: <pub-id pub-id-type="doi">10.1016/0306-4530(90)90018-5</pub-id>, PMID: <pub-id pub-id-type="pmid">2359813</pub-id></citation>
</ref>
<ref id="ref23">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Hughes</surname> <given-names>I.</given-names></name></person-group> (<year>2009</year>). <article-title>Congenital adrenal hyperplasia</article-title>. <source>Medicine</source> <volume>37</volume>, <fpage>423</fpage>&#x2013;<lpage>425</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.mpmed.2009.05.007</pub-id></citation>
</ref>
<ref id="ref24">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Kogler</surname> <given-names>L.</given-names></name> <name><surname>M&#x00FC;ller</surname> <given-names>V. I.</given-names></name> <name><surname>Moser</surname> <given-names>E.</given-names></name> <name><surname>Windischberger</surname> <given-names>C.</given-names></name> <name><surname>Gur</surname> <given-names>R. C.</given-names></name> <name><surname>Habel</surname> <given-names>U.</given-names></name> <etal/></person-group>. (<year>2023</year>). <article-title>Testosterone and the Amygdala's functional connectivity in women and men</article-title>. <source>J. Clin. Med.</source> <volume>12</volume>:<fpage>6501</fpage>. doi: <pub-id pub-id-type="doi">10.3390/jcm12206501</pub-id>, PMID: <pub-id pub-id-type="pmid">37892639</pub-id></citation>
</ref>
<ref id="ref25">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Krolick</surname> <given-names>K. N.</given-names></name> <name><surname>Zhu</surname> <given-names>Q.</given-names></name> <name><surname>Shi</surname> <given-names>H.</given-names></name></person-group> (<year>2018</year>). <article-title>Effects of estrogens on central nervous system neurotransmission: implications for sex differences in mental disorders</article-title>. <source>Prog. Mol. Biol. Transl. Sci.</source> <volume>160</volume>, <fpage>105</fpage>&#x2013;<lpage>171</lpage>. doi: <pub-id pub-id-type="doi">10.1016/bs.pmbts.2018.07.008</pub-id>, PMID: <pub-id pub-id-type="pmid">30470289</pub-id></citation>
</ref>
<ref id="ref26">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Laube</surname> <given-names>C.</given-names></name> <name><surname>van den Bos</surname> <given-names>W.</given-names></name> <name><surname>Fandakova</surname> <given-names>Y.</given-names></name></person-group> (<year>2020</year>). <article-title>The relationship between pubertal hormones and brain plasticity: implications for cognitive training in adolescence</article-title>. <source>Dev. Cogn. Neurosci.</source> <volume>42</volume>:<fpage>100753</fpage>. doi: <pub-id pub-id-type="doi">10.1016/j.dcn.2020.100753</pub-id></citation>
</ref>
<ref id="ref27">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Liao</surname> <given-names>W.-T.</given-names></name> <name><surname>Bai</surname> <given-names>Y.-M.</given-names></name></person-group> (<year>2014</year>). <article-title>Major depressive disorder induced by prolactinoma&#x2014;a case report</article-title>. <source>Gen. Hosp. Psychiatry</source> <volume>36</volume>:<fpage>125</fpage>. doi: <pub-id pub-id-type="doi">10.1016/j.genhosppsych.2013.01.010</pub-id>, PMID: <pub-id pub-id-type="pmid">24182617</pub-id></citation>
</ref>
<ref id="ref28">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Luis</surname> <given-names>E. O.</given-names></name> <name><surname>Akrivou</surname> <given-names>K.</given-names></name> <name><surname>Bermejo-Martins</surname> <given-names>E.</given-names></name> <name><surname>Scalzo</surname> <given-names>G.</given-names></name> <name><surname>Or&#x00F3;n</surname> <given-names>J. V.</given-names></name></person-group> (<year>2022</year>). <article-title>The Interprocessual-self theory in support of human neuroscience studies</article-title>. <source>Front. Psychol.</source> <volume>12</volume>:<fpage>686928</fpage>. doi: <pub-id pub-id-type="doi">10.3389/fpsyg.2021.686928</pub-id>, PMID: <pub-id pub-id-type="pmid">35153881</pub-id></citation>
</ref>
<ref id="ref29">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Majumdar</surname> <given-names>A.</given-names></name> <name><surname>Mangal</surname> <given-names>N. S.</given-names></name></person-group> (<year>2013</year>). <article-title>Hyperprolactinemia</article-title>. <source>J. Hum. Reprod. Sci.</source> <volume>6</volume>, <fpage>168</fpage>&#x2013;<lpage>175</lpage>. doi: <pub-id pub-id-type="doi">10.4103/0974-1208.121400</pub-id>, PMID: <pub-id pub-id-type="pmid">24347930</pub-id></citation>
</ref>
<ref id="ref30">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Mandiola</surname> <given-names>M. I.</given-names></name> <name><surname>Arancibia</surname> <given-names>M.</given-names></name> <name><surname>Elton</surname> <given-names>V.</given-names></name> <name><surname>Madrid</surname> <given-names>E.</given-names></name> <name><surname>Meza</surname> <given-names>N.</given-names></name> <name><surname>Stojanova</surname> <given-names>J.</given-names></name> <etal/></person-group>. (<year>2022</year>). <article-title>Perfeccionismo, estr&#x00E9;s acad&#x00E9;mico y ansiedad social en mujeres estudiantes de medicina y riesgo de padecer un trastorno alimentario: un modelo multivariado</article-title>. <source>Rev. M&#x00E9;d. de Chile</source> <volume>150</volume>, <fpage>1046</fpage>&#x2013;<lpage>1053</lpage>. doi: <pub-id pub-id-type="doi">10.4067/S0034-98872022000801046</pub-id></citation>
</ref>
<ref id="ref31">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Matsuda</surname> <given-names>M.</given-names></name> <name><surname>DeFronzo</surname> <given-names>R.</given-names></name></person-group> (<year>1999</year>). <article-title>Insulin sensitivity indices obtained from Oral glucose tolerance testing: comparison with the Euglycemic insulin clamp</article-title>. <source>Diabetes Care</source> <volume>22</volume>, <fpage>1462</fpage>&#x2013;<lpage>1470</lpage>. doi: <pub-id pub-id-type="doi">10.2337/diacare.22.9.1462</pub-id>, PMID: <pub-id pub-id-type="pmid">10480510</pub-id></citation>
</ref>
<ref id="ref32">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Maurer</surname> <given-names>M. M.</given-names></name> <name><surname>Maurer</surname> <given-names>J.</given-names></name> <name><surname>Hoff</surname> <given-names>E.</given-names></name> <name><surname>Daukantait&#x0117;</surname> <given-names>D.</given-names></name></person-group> (<year>2023</year>). <article-title>What is the process of personal growth? Introducing the personal growth process model</article-title>. <source>New Ideas Psychol.</source> <volume>70</volume>:<fpage>101024</fpage>. doi: <pub-id pub-id-type="doi">10.1016/j.newideapsych.2023.101024</pub-id></citation>
</ref>
<ref id="ref33">
<citation citation-type="book"><person-group person-group-type="author"><name><surname>Merleau-Ponty</surname> <given-names>M.</given-names></name></person-group> (<year>2002</year>). <source>Phenomenology of perception</source>. <publisher-loc>London</publisher-loc>: <publisher-name>Routledge</publisher-name>.</citation>
</ref>
<ref id="ref34">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Montelli</surname> <given-names>S.</given-names></name> <name><surname>Peruffo</surname> <given-names>A.</given-names></name> <name><surname>Zambenedetti</surname> <given-names>P.</given-names></name> <name><surname>Rossipal</surname> <given-names>E.</given-names></name> <name><surname>Giacomello</surname> <given-names>M.</given-names></name> <name><surname>Zatta</surname> <given-names>P.</given-names></name> <etal/></person-group>. (<year>2012</year>). <article-title>Expression of aromatase P450(AROM) in the human fetal and early postnatal cerebral cortex</article-title>. <source>Brain Res.</source> <volume>1475</volume>, <fpage>11</fpage>&#x2013;<lpage>18</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.brainres.2012.08.010</pub-id>, PMID: <pub-id pub-id-type="pmid">22902617</pub-id></citation>
</ref>
<ref id="ref35">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Mueller</surname> <given-names>S. C.</given-names></name> <name><surname>Grissom</surname> <given-names>E. M.</given-names></name> <name><surname>Dohanich</surname> <given-names>G. P.</given-names></name></person-group> (<year>2014</year>). <article-title>Assessing gonadal hormone contributions to affective psychopathologies across humans and animal models</article-title>. <source>Psychoneuroendocrinology</source> <volume>46</volume>, <fpage>114</fpage>&#x2013;<lpage>128</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.psyneuen.2014.04.015</pub-id>, PMID: <pub-id pub-id-type="pmid">24882164</pub-id></citation>
</ref>
<ref id="ref36">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Munro</surname> <given-names>M. G.</given-names></name> <name><surname>Balen</surname> <given-names>A. H.</given-names></name> <name><surname>Cho</surname> <given-names>S.</given-names></name> <name><surname>Critchley</surname> <given-names>H. O. D.</given-names></name> <name><surname>D&#x00ED;az</surname> <given-names>I.</given-names></name> <name><surname>Ferriani</surname> <given-names>R.</given-names></name> <etal/></person-group>. (<year>2022</year>). <article-title>The FIGO ovulatory disorders classification system</article-title>. <source>Fertil. Steril.</source> <volume>118</volume>, <fpage>768</fpage>&#x2013;<lpage>786</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.fertnstert.2022.07.009</pub-id>, PMID: <pub-id pub-id-type="pmid">35995633</pub-id></citation>
</ref>
<ref id="ref37">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Nicola</surname> <given-names>S. M.</given-names></name></person-group> (<year>2007</year>). <article-title>The nucleus accumbens as part of a basal ganglia action selection circuit</article-title>. <source>Psychopharmacology</source> <volume>191</volume>, <fpage>521</fpage>&#x2013;<lpage>550</lpage>. doi: <pub-id pub-id-type="doi">10.1007/s00213-006-0510-4</pub-id></citation>
</ref>
<ref id="ref38">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Nilsen</surname> <given-names>J.</given-names></name> <name><surname>Irwin</surname> <given-names>R. W.</given-names></name> <name><surname>Gallaher</surname> <given-names>T. K.</given-names></name> <name><surname>Brinton</surname> <given-names>R. D.</given-names></name></person-group> (<year>2007</year>). <article-title>Estradiol in vivo regulation of brain mitochondrial proteome</article-title>. <source>J. Neurosci.</source> <volume>27</volume>, <fpage>14069</fpage>&#x2013;<lpage>14077</lpage>. doi: <pub-id pub-id-type="doi">10.1523/JNEUROSCI.4391-07.2007</pub-id>, PMID: <pub-id pub-id-type="pmid">18094246</pub-id></citation>
</ref>
<ref id="ref39">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Norcross</surname> <given-names>J. C.</given-names></name> <name><surname>Guadagnoli</surname> <given-names>E.</given-names></name> <name><surname>Prochaska</surname> <given-names>J. O.</given-names></name></person-group> (<year>1984</year>). <article-title>Factor structure of the profile of mood states (POMS): two partial replications</article-title>. <source>J. Clin. Psychol.</source> <volume>40</volume>, <fpage>1270</fpage>&#x2013;<lpage>1277</lpage>. doi: <pub-id pub-id-type="doi">10.1002/1097-4679(198409)40:5&#x003C;1270::aid-jclp2270400526&#x003E;3.0.co;2-7</pub-id>, PMID: <pub-id pub-id-type="pmid">6490926</pub-id></citation>
</ref>
<ref id="ref40">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Or&#x00F3;n</surname> <given-names>J. V.</given-names></name></person-group> (<year>2015</year>). <article-title>Leonardo polo&#x2019;s integrative dynamic as a philosophical framework for understanding neuroscience</article-title>. <source>J. Polian Stu.</source> <volume>2</volume>, <fpage>109</fpage>&#x2013;<lpage>133</lpage>.</citation>
</ref>
<ref id="ref41">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Peters</surname> <given-names>S.</given-names></name> <name><surname>Jolles</surname> <given-names>D. J.</given-names></name> <name><surname>Duijvenvoorde</surname> <given-names>A. C. K. V.</given-names></name> <name><surname>Crone</surname> <given-names>E. A.</given-names></name> <name><surname>Peper</surname> <given-names>J. S.</given-names></name></person-group> (<year>2015</year>). <article-title>The link between testosterone and amygdala-orbitofrontal cortex connectivity in adolescent alcohol use</article-title>. <source>Psychoneuroendocrinology</source> <volume>53</volume>, <fpage>117</fpage>&#x2013;<lpage>126</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.psyneuen.2015.01.004</pub-id></citation>
</ref>
<ref id="ref42">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Pike</surname> <given-names>C. J.</given-names></name> <name><surname>Carroll</surname> <given-names>J. C.</given-names></name> <name><surname>Rosario</surname> <given-names>E. R.</given-names></name> <name><surname>Barron</surname> <given-names>A. M.</given-names></name></person-group> (<year>2009</year>). <article-title>Protective actions of sex steroid hormones in Alzheimer&#x2019;s disease</article-title>. <source>Front. Neuroendocrinol.</source> <volume>30</volume>, <fpage>239</fpage>&#x2013;<lpage>258</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.yfrne.2009.04.015</pub-id>, PMID: <pub-id pub-id-type="pmid">19427328</pub-id></citation>
</ref>
<ref id="ref43">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Pillerov&#x00E1;</surname> <given-names>M.</given-names></name> <name><surname>Borb&#x00E9;lyov&#x00E1;</surname> <given-names>V.</given-names></name> <name><surname>Pastorek</surname> <given-names>M.</given-names></name> <name><surname>Riljak</surname> <given-names>V.</given-names></name> <name><surname>Hodosy</surname> <given-names>J.</given-names></name> <name><surname>Frick</surname> <given-names>K. M.</given-names></name> <etal/></person-group>. (<year>2022</year>). <article-title>Molecular actions of sex hormones in the brain and their potential treatment use in anxiety disorders</article-title>. <source>Front. Psych.</source> <volume>13</volume>:<fpage>972158</fpage>. doi: <pub-id pub-id-type="doi">10.3389/fpsyt.2022.972158</pub-id>, PMID: <pub-id pub-id-type="pmid">36159923</pub-id></citation>
</ref>
<ref id="ref44">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Rahiminejad</surname> <given-names>M. E.</given-names></name> <name><surname>Moaddab</surname> <given-names>A.</given-names></name> <name><surname>Rabiee</surname> <given-names>S.</given-names></name> <name><surname>Esna-Ashari</surname> <given-names>F.</given-names></name> <name><surname>Borzouei</surname> <given-names>S.</given-names></name> <name><surname>Hosseini</surname> <given-names>S. M.</given-names></name></person-group> (<year>2014</year>). <article-title>The relationship between clinicobiochemical markers and depression in women with polycystic ovary syndrome</article-title>. <source>Iran. J. Reprod. Med.</source> <volume>12</volume>, <fpage>811</fpage>&#x2013;<lpage>816</lpage>., PMID: <pub-id pub-id-type="pmid">25709638</pub-id></citation>
</ref>
<ref id="ref45">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Randolph</surname> <given-names>J. F.</given-names> <suffix>Jr.</suffix></name> <name><surname>Zheng</surname> <given-names>H.</given-names></name> <name><surname>Sowers</surname> <given-names>M. R.</given-names></name> <name><surname>Crandall</surname> <given-names>C.</given-names></name> <name><surname>Crawford</surname> <given-names>S.</given-names></name> <name><surname>Gold</surname> <given-names>E. B.</given-names></name> <etal/></person-group>. (<year>2011</year>). <article-title>Change in follicle-stimulating hormone and estradiol across the menopausal transition: effect of age at the final menstrual period</article-title>. <source>J. Clin. Endocrinol. Metabol.</source> <volume>96</volume>, <fpage>746</fpage>&#x2013;<lpage>754</lpage>. doi: <pub-id pub-id-type="doi">10.1210/jc.2010-1746</pub-id>, PMID: <pub-id pub-id-type="pmid">21159842</pub-id></citation>
</ref>
<ref id="ref46">
<citation citation-type="book"><person-group person-group-type="author"><name><surname>Rogers</surname> <given-names>C. R.</given-names></name></person-group> (<year>1959</year>). <source>A theory of therapy, personality, and interpersonal relationships as developed in the client-centered framework</source>. <publisher-loc>Boston, MA</publisher-loc>: <publisher-name>Houghton Mifflin</publisher-name>.</citation>
</ref>
<ref id="ref47">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Rosenberg</surname> <given-names>M.</given-names></name></person-group> (<year>1965</year>). <article-title>The measurement of self-esteem, society and the adolescent self-image</article-title>. <source>Princeton</source>. <fpage>16</fpage>&#x2013;<lpage>36</lpage>. doi: <pub-id pub-id-type="doi">10.1515/9781400876136</pub-id></citation>
</ref>
<ref id="ref48">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Santoro</surname> <given-names>N.</given-names></name> <name><surname>Adel</surname> <given-names>T.</given-names></name> <name><surname>Skurnick</surname> <given-names>J. H.</given-names></name></person-group> (<year>1999</year>). <article-title>Decreased inhibin tone and increased activin A secretion characterize reproductive aging in women</article-title>. <source>Fertil. Steril.</source> <volume>71</volume>, <fpage>658</fpage>&#x2013;<lpage>662</lpage>. doi: <pub-id pub-id-type="doi">10.1016/S0015-0282(98)00529-9</pub-id></citation>
</ref>
<ref id="ref49">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Schiller</surname> <given-names>C. E.</given-names></name> <name><surname>Johnson</surname> <given-names>S. L.</given-names></name> <name><surname>Abate</surname> <given-names>A. C.</given-names></name> <name><surname>Schmidt</surname> <given-names>P. J.</given-names></name> <name><surname>Rubinow</surname> <given-names>D. R.</given-names></name></person-group> (<year>2016</year>). <article-title>Reproductive steroid regulation of mood and behavior</article-title>. <source>Compr. Physiol.</source> <volume>6</volume>, <fpage>1135</fpage>&#x2013;<lpage>1160</lpage>. doi: <pub-id pub-id-type="doi">10.1002/cphy.c150014</pub-id>, PMID: <pub-id pub-id-type="pmid">27347888</pub-id></citation>
</ref>
<ref id="ref50">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Schulz</surname> <given-names>K. M.</given-names></name> <name><surname>Sisk</surname> <given-names>C. L.</given-names></name></person-group> (<year>2016</year>). <article-title>The organizing actions of adolescent gonadal steroid hormones on brain and behavioral development</article-title>. <source>Neurosci. Biobehav. Rev.</source> <volume>70</volume>, <fpage>148</fpage>&#x2013;<lpage>158</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.neubiorev.2016.07.036</pub-id>, PMID: <pub-id pub-id-type="pmid">27497718</pub-id></citation>
</ref>
<ref id="ref51">
<citation citation-type="book"><person-group person-group-type="author"><name><surname>Shahid</surname> <given-names>A.</given-names></name> <name><surname>Wilkinson</surname> <given-names>K.</given-names></name> <name><surname>Marcu</surname> <given-names>S.</given-names></name> <name><surname>Shapiro</surname> <given-names>C. M.</given-names></name></person-group> (<year>2011</year>). &#x201C;<article-title>Profile of mood states (POMS)</article-title>&#x201D; in <source>STOP, THAT and one hundred other sleep scales</source> (<publisher-loc>Springer</publisher-loc>: <publisher-name>New York, NY</publisher-name>), <fpage>285</fpage>&#x2013;<lpage>286</lpage>.</citation>
</ref>
<ref id="ref52">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Shakerardekani</surname> <given-names>Z.</given-names></name> <name><surname>Nasehi</surname> <given-names>A.</given-names></name> <name><surname>Eftekhar</surname> <given-names>T.</given-names></name> <name><surname>Ghaseminezhad</surname> <given-names>A.</given-names></name> <name><surname>Ardekani</surname> <given-names>M. A.</given-names></name> <name><surname>Raisi</surname> <given-names>F.</given-names></name></person-group> (<year>2011</year>). <article-title>Evaluation of depression and mental health status in women with polycystic ovary syndrome</article-title>. <source>J. Family Reprod. Health</source> <volume>5</volume>, <fpage>67</fpage>&#x2013;<lpage>71</lpage>.</citation>
</ref>
<ref id="ref53">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Sinclair</surname> <given-names>S. J.</given-names></name> <name><surname>Blais</surname> <given-names>M. A.</given-names></name> <name><surname>Gansler</surname> <given-names>D. A.</given-names></name> <name><surname>Sandberg</surname> <given-names>E.</given-names></name> <name><surname>Bistis</surname> <given-names>K.</given-names></name> <name><surname>LoCicero</surname> <given-names>A.</given-names></name></person-group> (<year>2010</year>). <article-title>Psychometric properties of the Rosenbrg self-esteem scale: overall and across demographic groups living within the United States</article-title>. <source>Eval. Health Prof.</source> <volume>33</volume>, <fpage>56</fpage>&#x2013;<lpage>80</lpage>. doi: <pub-id pub-id-type="doi">10.1177/0163278709356187</pub-id></citation>
</ref>
<ref id="ref54">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Singh</surname> <given-names>B.</given-names></name> <name><surname>Sundaresh</surname> <given-names>V.</given-names></name></person-group> (<year>2022</year>). <article-title>Thyroid hormone use in mood disorders: revisiting the evidence</article-title>. <source>J. Clin. Psychiatry</source> <volume>83</volume>, <fpage>69</fpage>&#x2013;<lpage>71</lpage>. doi: <pub-id pub-id-type="doi">10.4088/JCP.22AC14590</pub-id>, PMID: <pub-id pub-id-type="pmid">35980260</pub-id></citation>
</ref>
<ref id="ref55">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Smith</surname> <given-names>C. T.</given-names></name> <name><surname>Sierra</surname> <given-names>Y.</given-names></name> <name><surname>Oppler</surname> <given-names>S. H.</given-names></name> <name><surname>Boettiger</surname> <given-names>C. A.</given-names></name></person-group> (<year>2014</year>). <article-title>Ovarian cycle effects on immediate reward selection bias in humans: a role for estradiol</article-title>. <source>J. Neurosci.</source> <volume>34</volume>, <fpage>5468</fpage>&#x2013;<lpage>5476</lpage>. doi: <pub-id pub-id-type="doi">10.1523/JNEUROSCI.0014-14.2014</pub-id></citation>
</ref>
<ref id="ref56">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Spaziani</surname> <given-names>M.</given-names></name> <name><surname>Tarantino</surname> <given-names>C.</given-names></name> <name><surname>Tahani</surname> <given-names>N.</given-names></name> <name><surname>Gianfrilli</surname> <given-names>D.</given-names></name> <name><surname>Sbardella</surname> <given-names>E.</given-names></name> <name><surname>Lenzi</surname> <given-names>A.</given-names></name> <etal/></person-group>. (<year>2021</year>). <article-title>Hypothalamo-pituitary axis and puberty</article-title>. <source>Mol. Cell. Endocrinol.</source> <volume>520</volume>:<fpage>111094</fpage>. doi: <pub-id pub-id-type="doi">10.1016/j.mce.2020.111094</pub-id>, PMID: <pub-id pub-id-type="pmid">33271219</pub-id></citation>
</ref>
<ref id="ref57">
<citation citation-type="book"><person-group person-group-type="author"><name><surname>Strauss</surname> <given-names>J.</given-names></name> <name><surname>Barbieri</surname> <given-names>R.</given-names></name> <name><surname>Dokras</surname> <given-names>A.</given-names></name> <name><surname>Williams</surname> <given-names>C.</given-names></name> <name><surname>Williams</surname> <given-names>Z.</given-names></name></person-group> (<year>2024</year>). <source>Yen and Jaffe&#x2019;s reproductive endocrinology: physiology, pathophysiology, and clinical management</source>. <edition>9th</edition> Edn. <publisher-loc>Amsterdam</publisher-loc>: <publisher-name>Elsevier</publisher-name>.</citation>
</ref>
<ref id="ref58">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Sundstr&#x00F6;m-Poromaa</surname> <given-names>I.</given-names></name> <name><surname>Gingnell</surname> <given-names>M.</given-names></name></person-group> (<year>2014</year>). <article-title>Menstrual cycle influence on cognitive function and emotion processing from a reproductive perspective</article-title>. <source>Front. Neurosci.</source> <volume>8</volume>:<fpage>380</fpage>. doi: <pub-id pub-id-type="doi">10.3389/fnins.2014.00380</pub-id>, PMID: <pub-id pub-id-type="pmid">25505380</pub-id></citation>
</ref>
<ref id="ref59">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Takahara</surname> <given-names>M.</given-names></name> <name><surname>Katakami</surname> <given-names>N.</given-names></name> <name><surname>Kaneto</surname> <given-names>H.</given-names></name> <name><surname>Noguchi</surname> <given-names>M.</given-names></name> <name><surname>Shimomura</surname> <given-names>I.</given-names></name></person-group> (<year>2013</year>). <article-title>Distribution of the Matsuda index in Japanese healthy subjects</article-title>. <source>J. Diabetes Investig.</source> <volume>4</volume>, <fpage>369</fpage>&#x2013;<lpage>371</lpage>. doi: <pub-id pub-id-type="doi">10.1111/jdi.12056</pub-id>, PMID: <pub-id pub-id-type="pmid">24843681</pub-id></citation>
</ref>
<ref id="ref60">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Tangney</surname> <given-names>J. P.</given-names></name> <name><surname>Baumeister</surname> <given-names>R. F.</given-names></name> <name><surname>Boone</surname> <given-names>A. L.</given-names></name></person-group> (<year>2004</year>). <article-title>High self-control predicts good adjustment, less pathology, better grades, and interpersonal success</article-title>. <source>J. Pers.</source> <volume>72</volume>, <fpage>271</fpage>&#x2013;<lpage>324</lpage>. doi: <pub-id pub-id-type="doi">10.1111/j.0022-3506.2004.00263.x</pub-id>, PMID: <pub-id pub-id-type="pmid">15016066</pub-id></citation>
</ref>
<ref id="ref61">
<citation citation-type="book"><person-group person-group-type="author"><name><surname>Tangney</surname> <given-names>J. P.</given-names></name> <name><surname>Boone</surname> <given-names>A. L.</given-names></name> <name><surname>Baumeister</surname> <given-names>R. F.</given-names></name></person-group> (<year>2018</year>). &#x201C;<article-title>High self-control predicts good adjustment, less pathology, better grades, and interpersonal success</article-title>&#x201D; in <source>Self-regulation and self-control</source> (<publisher-loc>London</publisher-loc>: <publisher-name>Routledge</publisher-name>), <fpage>173</fpage>&#x2013;<lpage>212</lpage>.</citation>
</ref>
<ref id="ref62">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Vaishya</surname> <given-names>R.</given-names></name> <name><surname>Rahul</surname> <given-names>G.</given-names></name> <name><surname>Sarika</surname> <given-names>A.</given-names></name></person-group> (<year>2010</year>). <article-title>Macroprolactin; a frequent cause of misdiagnosed hyperprolactinemia in clinical practice</article-title>. <source>J. Reprod. Infertil.</source> <volume>11</volume>, <fpage>161</fpage>&#x2013;<lpage>167</lpage>.</citation>
</ref>
<ref id="ref63">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Vermeulen</surname> <given-names>A.</given-names></name> <name><surname>Verdonck</surname> <given-names>L.</given-names></name> <name><surname>Kaufman</surname> <given-names>J. M.</given-names></name></person-group> (<year>1999</year>). <article-title>A critical evaluation of simple methods for the estimation of free testosterone in serum</article-title>. <source>J. Clin. Endocrinol. Metab.</source> <volume>84</volume>, <fpage>3666</fpage>&#x2013;<lpage>3672</lpage>. doi: <pub-id pub-id-type="doi">10.1210/jcem.84.10.6079</pub-id>, PMID: <pub-id pub-id-type="pmid">10523012</pub-id></citation>
</ref>
<ref id="ref64">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Vigil</surname> <given-names>P.</given-names></name> <name><surname>Contreras</surname> <given-names>J. L. A.</given-names></name> <name><surname>Godoy</surname> <given-names>A.</given-names></name> <name><surname>Salgado</surname> <given-names>A. M.</given-names></name> <name><surname>Cortes</surname> <given-names>M. E.</given-names></name></person-group> (<year>2007</year>). <article-title>Evidence of subpopulations with different levels of insulin resistance in women with polycystic ovary syndrome</article-title>. <source>Hum. Reprod.</source> <volume>22</volume>, <fpage>2974</fpage>&#x2013;<lpage>2980</lpage>. doi: <pub-id pub-id-type="doi">10.1093/humrep/dem302</pub-id>, PMID: <pub-id pub-id-type="pmid">17895281</pub-id></citation>
</ref>
<ref id="ref65">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Vigil</surname> <given-names>P.</given-names></name> <name><surname>del R&#x00ED;o</surname> <given-names>J. P.</given-names></name> <name><surname>Carrera</surname> <given-names>B.</given-names></name> <name><surname>Ar&#x00E1;nguiz</surname> <given-names>F. C.</given-names></name> <name><surname>Rioseco</surname> <given-names>H.</given-names></name> <name><surname>Cort&#x00E9;s</surname> <given-names>M. E.</given-names></name></person-group> (<year>2016</year>). <article-title>Influence of sex steroid hormones on the adolescent brain and behavior: an update</article-title>. <source>Linacre Q.</source> <volume>83</volume>, <fpage>308</fpage>&#x2013;<lpage>329</lpage>. doi: <pub-id pub-id-type="doi">10.1080/00243639.2016.1211863</pub-id>, PMID: <pub-id pub-id-type="pmid">27833209</pub-id></citation>
</ref>
<ref id="ref66">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Vigil</surname> <given-names>P.</given-names></name> <name><surname>Lyon</surname> <given-names>C.</given-names></name> <name><surname>Flores</surname> <given-names>B.</given-names></name> <name><surname>Rioseco</surname> <given-names>H.</given-names></name> <name><surname>Serrano</surname> <given-names>F.</given-names></name></person-group> (<year>2017</year>). <article-title>Ovulation, a sign of health</article-title>. <source>Linacre Q.</source> <volume>84</volume>, <fpage>343</fpage>&#x2013;<lpage>355</lpage>. doi: <pub-id pub-id-type="doi">10.1080/00243639.2017.1394053</pub-id>, PMID: <pub-id pub-id-type="pmid">29255329</pub-id></citation>
</ref>
<ref id="ref67">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Vigil</surname> <given-names>P.</given-names></name> <name><surname>Orellana</surname> <given-names>R. F.</given-names></name> <name><surname>Cort&#x00E9;s</surname> <given-names>M. E.</given-names></name> <name><surname>Molina</surname> <given-names>C. T.</given-names></name> <name><surname>Switzer</surname> <given-names>B. E.</given-names></name> <name><surname>Klaus</surname> <given-names>H.</given-names></name></person-group> (<year>2011</year>). <article-title>Endocrine modulation of the adolescent brain: a review</article-title>. <source>J. Pediatr. Adolesc. Gynecol.</source> <volume>24</volume>, <fpage>330</fpage>&#x2013;<lpage>337</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.jpag.2011.01.061</pub-id></citation>
</ref>
<ref id="ref68">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Wharton</surname> <given-names>W.</given-names></name> <name><surname>Gleason</surname> <given-names>C.</given-names></name> <name><surname>Sandra</surname> <given-names>O.</given-names></name> <name><surname>Carlsson</surname> <given-names>C.</given-names></name> <name><surname>Asthana</surname> <given-names>S.</given-names></name></person-group> (<year>2012</year>). <article-title>Neurobiological underpinnings of the estrogen - mood relationship</article-title>. <source>Curr. Psychiatr. Rev.</source> <volume>8</volume>, <fpage>247</fpage>&#x2013;<lpage>256</lpage>. doi: <pub-id pub-id-type="doi">10.2174/157340012800792957</pub-id>, PMID: <pub-id pub-id-type="pmid">23990808</pub-id></citation>
</ref>
<ref id="ref69">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Whitlock</surname> <given-names>J. R.</given-names></name> <name><surname>Heynen</surname> <given-names>A. J.</given-names></name> <name><surname>Shuler</surname> <given-names>M. G.</given-names></name> <name><surname>Bear</surname> <given-names>M. F.</given-names></name></person-group> (<year>2006</year>). <article-title>Learning induces long-term potentiation in the Hippocampus</article-title>. <source>Science</source> <volume>313</volume>, <fpage>1093</fpage>&#x2013;<lpage>1097</lpage>. doi: <pub-id pub-id-type="doi">10.1126/science.1128134</pub-id></citation>
</ref>
<ref id="ref70">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Zheng</surname> <given-names>P.</given-names></name></person-group> (<year>2009</year>). <article-title>Neuroactive steroid regulation of neurotransmitter release in the CNS: action, mechanism and possible significance</article-title>. <source>Prog. Neurobiol.</source> <volume>89</volume>, <fpage>134</fpage>&#x2013;<lpage>152</lpage>. doi: <pub-id pub-id-type="doi">10.1016/j.pneurobio.2009.07.001</pub-id></citation>
</ref>
<ref id="ref71">
<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Zweifel</surname> <given-names>J. E.</given-names></name> <name><surname>O&#x2019;Brien</surname> <given-names>W. H.</given-names></name></person-group> (<year>1997</year>). <article-title>A meta-analysis of the effect of hormone replacement therapy upon depressed mood</article-title>. <source>Psychoneuroendocrinology</source> <volume>22</volume>, <fpage>189</fpage>&#x2013;<lpage>212</lpage>. doi: <pub-id pub-id-type="doi">10.1016/s0306-4530(96)00034-0</pub-id>, PMID: <pub-id pub-id-type="pmid">9203229</pub-id></citation>
</ref>
</ref-list>
</back>
</article>