REVIEW article

Front. Med., 19 October 2022

Sec. Obstetrics and Gynecology

Volume 9 - 2022 | https://doi.org/10.3389/fmed.2022.1030004

Resistant ovary syndrome: Pathogenesis and management strategies

  • College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, China

Article metrics

View details

9

Citations

17,4k

Views

2k

Downloads

Abstract

Resistant ovary syndrome (ROS) is a rare and difficult gynecological endocrine disorder that poses a serious risk to women’s reproductive health. The clinical features are normal sex characteristics, regular female karyotype, and usual ovarian reserve, but elevated endogenous gonadotropin levels and low estrogen levels with primary or secondary amenorrhea. Although there have been many case reports of the disease over the past 50 years, the pathogenesis of the disease is still poorly understood, and there are still no effective clinical management strategies. In this review, we have collected all the current reports on ROS and summarized the pathogenesis and treatment strategies for this disease, intending to provide some clinical references for the management and treatment of this group of patients and provide the foothold for future studies.

Introduction

Resistant ovary syndrome (ROS), also known as ovarian insensitivity syndrome or Savage syndrome, is a rare gynecological condition with heterogeneous etiology that was first identified and named by de Moraes-Ruehsen and Jones (1).

Patients present clinically with primary or secondary amenorrhea before the age of 30 years of age, with a low response to exogenous gonadotropins and biochemical tests suggesting elevated endogenous gonadotropin levels and low estrogen levels. Moreover, ROS patients present with normal karyotype and normal ovarian reserve, i.e., normal Anti-Mullerian Hormone (AMH) and inhibin B (INB) levels, and with normal numbers of small follicles on vaginal ultrasound and laparoscopic ovarian histology (2–4).

According to the World Health Organization (WHO) classification (5), ROS belongs to type III amenorrhea characterized by hypergonadotropic hypogonadism (6, 7). It is often difficult to distinguish clinically from primary ovarian insufficiency (POI) or premature ovarian failure (POF) and is considered a subtype of POI or POF.

Etiology and pathogenesis

Current research on ROS is still in its preliminary stage. Given its low prevalence, it has predominantly been reported as scattered cases, and no large sample-size studies have been conducted. Studies on the mechanism have mostly focused on gonadotropin pre-receptor and partial receptor levels. Deficiency of follicle-stimulating growth factors, mutations in the follicle-stimulating hormone (FSH) receptor or beta subunit, abnormal gonadotropin signaling, and autoimmune problems are potential causes of this disorder. It has been established that the mechanism of ROS involves the failure of gonadotropins to act effectively on the follicles. Accordingly, the follicles fail to develop normally and stagnate in a resting state.

Inactive mutations of follicle-stimulating hormone

Current evidence suggests that primordial follicles develop to the primary stage mediated by the PI3K/AKT/mTOR signaling pathway (8) (initial recruitment), while most primordial follicles remain inhibited until they receive activation signals. Once growth begins, the primordial follicles develop into sinus follicles in response to local cellular regulators in the ovary, such as keratinocyte growth factor (KGF) (9), platelet-derived growth factor (PDGF) (10), basic fibroblast growth factor (bFGF) (11), and so on. Although most early sinus follicles undergo atresia, at least one sinus follicle will progress to preovulation (circulating recruitment) under pituitary FSH and luteinizing hormone (LH) stimulation (12). During the later stages of follicular development, FSH provides the primary stimulus (13, 14; Figure 1). Intriguingly, inactivating FSH mutations result in many sinus follicles developing without the support of endogenous FSH and failing to develop into dominant follicles, remaining in the primary stage. Clinically, several small follicles without dominant follicles can be observed under vaginal B-ultrasound.

FIGURE 1

Abnormalities in the regulation of follicle-stimulating factors

Besides FSH, C-type natriuretic peptide (CNP) is a follicle-stimulating factor that has been identified in recent years (12, 15). CNP belongs to the natriuretic peptide family and is characterized by a highly conserved 17-membered ring structure formed by intramolecular disulfide bonds (16). It was found that the precursor protein natriuretic peptide precursor C (NPPC) of CNP and its cognate receptor natriuretic peptide receptor-B (NPRB) were expressed in sinus follicles and preovulatory follicles (17). CNP is produced by the sinus follicle and binds to its receptor to stimulate follicle development by activating the guanylate cyclase coupled receptor to produce cyclic guanosine monophosphate (cGMP) (18, 19). In addition, in the preovulatory follicle, CNP stimulates cGMP production by activating NPRB, which is expressed by perivitelline and oocyte-associated cumulus cells (CCs) and diffuses into oocytes via gap junctions (20). In oocytes, cGMP inhibits phosphodiesterase 3A, thereby preventing cAMP hydrolysis (20). Overwhelming evidence suggests that adenosine 3′, 5′-cyclic phosphate (cAMP) is a second messenger in various central cellular functions. In the ovaries, cAMP regulates ovulation, enhances primordial follicle growth, and provides a key signal for gonadotropin action on the gonads. High levels of cAMP can promote growth in primordial follicles (21) and inhibit oocyte maturation (20). Sato et al. (18) reported that daily injections of CNP to infant mice could promote follicle growth, and ovulation was successfully induced by gonadotropins. This was also demonstrated by in vitro studies (22). This finding suggests that CNP is essential for follicular growth and development. Regional follicular growth and development in ROS patients may be related to the abnormal regulation of this factor (Figure 2).

FIGURE 2

Mutations in the follicle-stimulating hormone receptor gene

The interaction of FSH with its receptor is critical for follicle development and maturation. Interestingly, any variation in the FSHR genotype may alter the receptor’s ability to bind FSH and induce downstream signaling pathways. Inactivating mutations in the FSHR gene have been associated with loss of ovarian function in women, and these mutations lead to impaired receptor function (23). Abel et al. (24) found that follicles developed to the antral follicle stage in mice with disrupted FSHR gene, suggesting that the FSHR defect does not affect the development of the antral follicle, accounting for a large number of primordial follicles in the ovary of ROS patients with no sinus follicle development.

It is well-established that mutations in the FSHR are rare, and only 25 loss-of-function mutations in FSHR have been found in women with ovarian dysgenesis, primary amenorrhea, and secondary amenorrhea (Table 1). Of these, the C 566 T mutation is only seen in Finns, suggesting a possible interethnic difference (25). Mutations in the FSHR gene are reportedly rare in UK women with ROS (26). However, most studies had small sample sizes and did not provide robust evidence that FSHR gene polymorphisms have pathophysiological significance in ovarian function.

TABLE 1

No.Nucleotide change
(exon number)
Amino acid changePhenotype of subjectsReferences
1c.566C>T (exon 7)p.Ala189ValPrimary amenorrhea with increased serum FSH levels(27)
2c.662T>G (exon 8)p.Val221GlyPrimary amenorrhea(28)
3c.671A>T (exon 7)
c.1801C>G (exon 10)
p.Asp224Val
p.Leu601Val
Primary amenorrhea with increased serum FSH levels(23)
4c.1043C>G (exon 10)p.Pro348ArgPrimary amenorrhea with increased serum FSH levels(29)
5c.1255G>A (exon 10)p.Ala419V alPrimary amenorrhea with increased serum FSH levels(30)
6c.1555C>A (exon 10)p.Pro519ThrPrimary ovarian failure with increased FSH levels(31)
7c.1760C>A (exon 10)p.Pro587HisPrimary amenorrhea(32)
8c.1723C>T (exon 10)p.Ala575ValPrimary amenorrhea with hypergonadotropic hypogonadism(25)
9c.175C>T (exon 2)p.Arg59TermPrimary ovarian insufficiency with increased serum FSH levels(33)
10c.1222G>T (exon 10)p.Asp408TyrPrimary amenorrhea with increased serum FSH levels(34)
11c.1253T>G (exon 10)p.Ile418SerPrimary ovarian failure and hypergonadotropic hypogonadism(35)
12c.1298C>A (exon 10)p.Ala433AspHypergonadotropic hypogonadism(36)
13c.419delA
c.1510C>T
c.44G>A (exons 1 and 2)
p.Lys140Argfs*16
p.Pro504Ser
p.Gly15Asp
Primary ovarian insufficiency with resistant ovary syndrome(37)
14I423T (exon 10)–Primary amenorrhea with primary ovarian failure(38)
15c.479C>T (exon 6)
c.1717C>T (exon 10)
p.Ile160Thr
p.Arg573Cys
Secondary amenorrhea with increased serum FSH levels(39, 40)
16c.182T>A (exon 2)
c.2062C>A (exon 10)
p.Ile61Asn
p.Pro688Thr
Secondary amenorrhea with resistant ovary syndrome(41)
17c.793A>G (exon 9)
c.1789C>A (exon 10)
p.M265V
p.L597I
Secondary amenorrhea with premature ovarian insufficiency(42)
18c.646G>A (exon 8)
c.1313C>T (exon 10)
p.Gly216Arg
p.Thr438Ile
Secondary amenorrhea with premature ovarian insufficiency(43)

Inactivating mutations of follicle-stimulating hormone receptor (FSHR) previously reported in women with ovarian dysgenesis, primary amenorrhea, and secondary amenorrhea.

Abnormal regulation of granulocyte proliferation factors

At least three oocyte-derived factors have been shown to promote the growth of granulosa cells, including R-spondin2, growth differentiation factor 9 (GDF9), and bone morphogenetic protein 15 (BMP15) (12). Studies in mice have revealed that the transcripts of R-spondin2 are only present in primary oocytes and oocytes of larger follicles but not in the initiating follicles (44). The decrease of R-spondin2 level may lead to failure of follicle development in the late reproductive phase (12), which may contribute to the fact that in ROS patients, during repeated ovulation stimulation, even when follicles develop, they reach atresia occurs before dominance. If similar R-spondin2 effects are identified in humans, R-spondin agonists could provide a new therapeutic approach for infertile women (12).

In addition to R-spondin2, GDF9 and BMP15 are local factors produced by oocytes that stimulate follicle development. They are members of the TGF-β superfamily of cystine junctional proteins (45) and bind to receptor serine kinases (RSK) to stimulate downstream signaling (46). Both factors bind to type II RSK BMP receptor II (47) and recruit type I RSK for GDF9, and BMP15 to regulate downstream SMAD proteins in granulosa cells. Current evidence suggests that GDF9 treatment enhances the growth and differentiation of cultured prezygotic follicles (48). In vivo, treatment with GDF9 promotes the development of primordial follicles to primary and antral follicles (49). GDF9 also has antiapoptotic effects during early sinus follicle development (50). In the ovaries of ROS patients, follicles are often present in the primordial state, which may be associated with a lack of or abnormal regulation of the GDF9 factor.

Immunity-related issues

Many studies have shown that the pathogenesis of ROS is related to immune factors. Most studies found that patients with ROS may have autoantibodies against FSHR that block the ovarian response to gonadotropin stimulation (51–55). In this respect, Rogenhofer et al. (6) identified antibodies against human menopausal gonadotropin (HMG) that were not recombinant-FSH (re-FSH) in a patient with ROS. It has also been found that IgG can block DNA synthesis of granulosa cells stimulated by FSH in ROS patients (56). In addition, Chiauzzi et al. (52) found immunoglobulin (Ig-FSHR) in the blood of patients with ROS that inhibited the binding of FSH to its receptor by detecting the level of circulating immunoglobulin in patients with ROS. Escobar et al. (57) reported a case of myasthenia gravis with ROS whereby a substance behaving like gamma globulins could inhibit binding to FSH-specific receptors in an in vitro system.

In contrast, Starup and Pedersen (58) found no circulating gonadotropin antibodies in a 21 years-old woman with ROS. Consistently, Board et al. (59) found no autoimmune antibodies in ROS patients. Moreover, recent case reports of ROS in which patients were examined for immune disorders showed no signs of immune disorders (anti-nuclear antibodies, antiphospholipid antibodies, lupus antibodies, antibodies to semicarbazide, adrenocortical autoantibodies, steroid cell autoantibodies, serum 21-hydroxylase, 17-hydroxylase, and P450 side-chain cleavage enzyme autoantibodies were all negative) (60–62).

Management strategy

The clinical treatment varies for women of different ages, with various complaints and other clinical manifestations. For girls during puberty, the main aim is to promote the development of secondary sexual characteristics, maintain normal menstrual flow and protect the function of the ovaries, mainly using hormone supplementation; for women of childbearing age without fertility requirements, the basic principle of treatment is to provide physiological supplementation and prevent diseases in other systems caused by hormone deficiency. In contrast, assisted reproductive techniques such as ovulation promotion and in vitro culture of immature oocytes can be performed for women of childbearing age with fertility requirements. All specific treatment options suggested are based on case reports (Figure 3).

FIGURE 3

Management strategy of resistant ovary syndrome patients without fertility requirements

Hormone replacement therapy

For adolescents or women of childbearing age who do not require fertility, treatment of ROS usually begins with hormone replacement therapy (HRT) to maintain normal menstruation. Estrogen (e.g., estradiol valerate 2–4 mg/d) and progestin (e.g., norgestrel 500 mg/d) are administered for 22–28 days (63, 64). Withdrawal bleeding occurs on days 3–7 after discontinuation, and the next cycle is administered on the 5th day of menstruation, usually for three consecutive cycles. In addition, short-acting oral contraceptive pills (OCP) can be used to establish an artificial menstrual cycle for patients.

Treatment of resistant ovary syndrome patients with fertility requirements

Hormone replacement therapy

For ROS patients with fertility requirements, ovulation induction therapy or other assisted fertility methods are usually performed based on HRT (usually ≥3 months). However, cases of ROS having spontaneous pregnancies and successful live births during or after treatment with HRT have been extensively reported in the literature (63–68).

Mueller et al. (63) reported on a 26 years-old woman with primary infertility with decreased serum FSH and LH levels and increased levels of estradiol, progesterone, and inhibin A during the third month of HRT, leading to spontaneous follicular growth, maturation, and ovulation. One cycle after discontinuation of the drug, there was still spontaneous ovulation of follicles, and the patient successfully conceived. Lim et al. (69) reported a 24 years-old ROS woman with secondary amenorrhea and primary infertility. After 2 months of cyclic estrogen-progestin replacement therapy, insufficient inhibition of FSH and LH was observed. Subsequently, she was prescribed 100 pg of Ethinyl Estradiol daily for 23 consecutive months and successfully conceived.

It is possible that exogenous estrogen suppressed excessive gonadotropins in the body, resulting in increased sensitivity of FSH receptors on follicular membrane cells and increased sensitivity to gonadotropins, allowing follicles to become sensitive to ovulatory drugs or spontaneously ovulate and conceive (70). Although individual cases cannot indicate whether the treatment was effective or occurred by chance, it has been established that approximately 13% of ROS patients can become pregnant spontaneously after low-dose HRT. Accordingly, pregnancy is still possible after HRT treatment in ROS patients (71).

Combined letrozole and human menopausal gonadotropin for ovulation

Letrozole is a third-generation aromatase inhibitor, and its peripheral action is key to the successful induction of ovulation in patients with ROS. In the periphery, letrozole blocks the conversion of androgens to estrogens at the ovarian level by inhibiting aromatase activity, leading to a transient accumulation of androgens in the ovary, which in turn stimulates the expression of insulin-like growth factor I and other autocrine and paracrine factors and increases ovarian responsiveness to gonadotropins (72). The combination of HMG and letrozole can maximize its effect and reduce the dosage of HMG. Mu et al. (73) reported the successful induction of dominant follicle development and ovulation in a patient with ROS after ovulation promotion with letrozole combined with HMG, resulting in the live birth of a healthy male infant.

Laparoscopic ovarian incision

In recent years, laparoscopy has been widely used in treating gynecological diseases due to its low invasiveness, good surgical field, rapid healing, low risk of infection, low impact on the abdominal organs and high safety profile. LOI is a novel and simple laparoscopic procedure that promotes follicular growth in patients with follicular maturation disorders by mechanical damage to the ovarian cortex (74) to provide the intrinsic stimulation needed for dormant follicles.

Tanaka et al. (75) performed LOI in 11 patients with ROS, followed by controlled ovarian hyperstimulation (COH) for at least 1 year. Four ROS patients became pregnant and delivered three healthy babies with one ongoing pregnancy.

Controlled ovarian hyperstimulation and in vitro fertilization

Unlike conventional COH, the COH scheme of ROS patients may be slightly different due to the lack of antibodies or receptors in the ovary in ROS patients and there is no clear clinical consensus on this.

Rogenhofer et al. (6) reported a 26 years-old woman with secondary amenorrhea with fertility appeal that was given HRT. On day 20 of the third cycle, Gonadotropin-releasing hormone agonist (GnRH-a) was used for downregulation, and 75IU rec-FSH-β and 225 IU HMG were injected subcutaneously on day 10 of downregulation. Ultrasound examination showed 12 dominant follicles 14 days after treatment. Intracytoplasmic sperm injection (ICSI) was performed after egg removal, and a boy was born naturally after transplantation. The patient received a steady and sustained suppression of gonadotropins, thus increasing ovarian sensitivity, which may be attributed to pituitary downregulation (76).

Controlled ovarian hyperstimulation and in vitro fertilization combined with glucocorticoids

Glucocorticoids (GC) are extremely important regulatory molecules in the body and play an important role in regulating the development, growth, metabolism and immune function of the body. In clinical practice, they are widely used as anti-inflammatory and immunosuppressive agents (77). Dexamethasone is a long-acting GC widely used in allergic and autoimmune inflammatory diseases. Li et al. (78) reported a case of ROS with serological evidence of antibodies against FSHR, who eventually achieved a live birth after ovarian stimulation combined with dexamethasone treatment. Hydrocortisone is a short-acting GC with anti-inflammatory and anti-allergic effects and is widely used in immune disorders. Riestenberg et al. (79) documented a case of Ig-FSHR-related POI initially resistant to maximal dose gonadotropin stimulation that eventually underwent successful COH and oocyte cryopreservation using short-term high-dose prednisone for transient immunosuppression. The above two cases indicate that GC suppression of abnormal autoimmune antibodies may be used for ROS treatment.

In vitro maturation of oocytes

In vitro maturation is a method of obtaining immature cumulus-oocyte complexes from antral follicles with or without ovulation medication, culturing them in vitro under suitable conditions to mature to the MII stage, followed by IVF/ICSI to achieve pregnancy (80). Indications for IVM include cases of ROS with impaired oocyte maturation. Since 2013, several cases of ROS in women successfully conceiving following IVM have been reported clinically (62, 81–87). Galvao et al. (83) reported that nine patients with ROS underwent 24 IVM cycles and found that the live birth rate was 16.7% per started cycle and 33.3% per patient. Therefore, IVM offers a meaningful approach to fertility claims in ROS patients, but it is more costly.

Growth hormone combined with ovulation induction

It is widely acknowledged that the reproductive and growth axes often interact, and GH indirectly affects ovarian development and its sensitivity to gonadotropins during puberty through gonadotropins and insulin-like growth factor 1 (IGF-I) (88). Growth hormone deficiency or insufficiency leads to delayed puberty and affects normal ovarian function. Studies in recent years have shown that growth hormone can improve ovarian responsiveness, promote endometrial growth, improve ovulation treatment in patients with low ovarian response, and increase pregnancy rates with cyclic ovulation. However, the use of growth hormone in the promotion of ovulation in patients with ROS warrants further investigation (89–92). Mueller et al. (63) reported a case of ROS in which follicle growth was not successfully induced with growth hormone. There are no reports in the literature on the effectiveness of growth hormones in promoting ovulation in patients with ROS.

Dehydroepiandrosterone combined with ovulation induction

Dehydroepiandrosterone (DHEA) is a steroid abundant in human blood circulation (93). It enters the circulation mainly in the form of DHEA sulfate (DHEA-S), which has weak androgenic effects and is converted to testosterone and estradiol in peripheral tissues (94). Interestingly, Zangmo et al. (95) found an increase in the number of oocytes, fertilization rates, and whole embryos in IVF cycles in patients with poor ovarian response to DHEA. Similarly, some studies confirmed that DHEA could optimize the fertility of POI patients and lead to successful pregnancy (96, 97). However, Wong et al. (98) found no benefit of DHEA supplementation on functional improvement in POI patients through a prospective observational study.

Oocyte donation

With the development of assisted reproductive technology, the technical challenges of oocyte donation have largely been resolved, but the ethical issues it raises are also a hot topic of the current debate on the technology (99). It is widely thought that donor oocytes can be used for in vitro fertilization transplantation only in ROS patients who have not responded well to long-term ovulation-promoting drugs.

Other treatments

In addition to the above treatments, appropriate calcium and vitamin D supplementation can prevent osteoporosis due to estrogen deficiency in ROS patients (100); appropriate psychological support is also helpful in restoring follicular development and ovulation in ROS patients (101). In addition, Chinese medicine has been reported to assist in treating ROS patients via kidney tonification. However, specific treatment effects need to be studied in large sample size studies.

Conclusion

Research is still ongoing to understand the complex pathogenesis of ROS, given its intricacy. The exact mechanisms remain largely unclear, and currently available approaches are often ineffective. The heterogeneity in the etiology of ROS account for the wide range of individual treatment options, and treatment modalities such as psychological support, artificial cycles, and ovulation promotion do not address the root of the patient’s problem. The poor effectiveness of treatment is often accompanied by the psychological and financial strain of long-term medication on patients. Accordingly, an in-depth understanding of the pathogenesis of the disease is an important prerequisite for studying ROS management strategies. With the development of assisted reproductive technology, new assisted reproductive methods such as IVM, GH, and DHEA addition may be able to solve the fertility problems of this patient population, but more comprehensive and effective management strategies need to be further investigated.

Statements

Author contributions

LL conceived and directed the manuscript writing. ZM reviewed the literature and wrote the manuscript. SS reviewed the literature. All authors contributed to the article and approved the submitted version.

Funding

This work was supported by grants from the Natural Science Fund of Hunan Province (No. 2021JJ30493), the Key Scientific Research Project of the Education Department of Hunan Province (No. 19A364), and Traditional Chinese Medicine Research Program of Hunan Province (No. 2021007).

Acknowledgments

We would like to thank Servier Medical Art for providing graphical material for this manuscript.

Conflict of interest

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.

Publisher’s note

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.

References

  • 1.

    de Moraes-RuehsenMJonesGS. Premature ovarian failure.Fertil Steril. (1967) 18:440–61. 10.1016/s0015-0282(16)36362-2

  • 2.

    TanSLHagueWMBeckerFJacobsHS. Autoimmune premature ovarian failure with polyendocrinopathy and spontaneous recovery of ovarian follicular activity.Fertil Steril. (1986) 45:421–4. 10.1016/s0015-0282(16)49229-0

  • 3.

    HuhtaniemiIAlevizakiM. Gonadotrophin resistance.Best Pract Res Clin Endocrinol Metab. (2006) 20:561–76. 10.1016/j.beem.2006.09.003

  • 4.

    LatronicoACArnholdIJ. Gonadotropin resistance.Endocr Dev. (2013) 24:25–32. 10.1159/000342496

  • 5.

    De VosMDevroeyPFauserBC. Primary ovarian insufficiency.Lancet. (2010) 376:911–21. 10.1016/S0140-6736(10)60355-8

  • 6.

    RogenhoferNPavlikRJeschkeUWypiorGOchsenkuhnRThalerCJ. Effective ovarian stimulation in a patient with resistant ovary syndrome and antigonadotrophin antibodies.Am J Reprod Immunol. (2015) 73:185–91. 10.1111/aji.12306

  • 7.

    JonesGSDe Moraes-RuehsenM. A new syndrome of amenorrhae in association with hypergonadotropism and apparently normal ovarian follicular apparatus.Am J Obstet Gynecol. (1969) 104:597–600. 10.1016/s0002-9378(16)34255-7

  • 8.

    GrosboisJDemeestereI. Dynamics of PI3K and hippo signaling pathways during in vitro human follicle activation.Hum Reprod. (2018) 33:1705–14. 10.1093/humrep/dey250

  • 9.

    ParrottJASkinnerMK. Developmental and hormonal regulation of keratinocyte growth factor expression and action in the ovarian follicle.Endocrinology. (1998) 139:228–35. 10.1210/endo.139.1.5680

  • 10.

    NilssonEEDetzelCSkinnerMK. Platelet-derived growth factor modulates the primordial to primary follicle transition.Reproduction. (2006) 131:1007–15. 10.1530/rep.1.00978

  • 11.

    GhezelayaghZAbtahiNSRezazadeh ValojerdiMMehdizadehAEbrahimiB. The combination of basic fibroblast growth factor and kit ligand promotes the proliferation, activity and steroidogenesis of granulosa cells during human ovarian cortical culture.Cryobiology. (2020) 96:30–6. 10.1016/j.cryobiol.2020.08.011

  • 12.

    HsuehAJKawamuraKChengYFauserBC. Intraovarian control of early folliculogenesis.Endocr Rev. (2015) 36:1–24. 10.1210/er.2014-1020

  • 13.

    AdriaensICortvrindtRSmitzJ. Differential FSH exposure in preantral follicle culture has marked effects on folliculogenesis and oocyte developmental competence.Hum Reprod. (2004) 19:398–408. 10.1093/humrep/deh074

  • 14.

    HillierSG. Current concepts of the roles of follicle stimulating hormone and luteinizing hormone in folliculogenesis.Hum Reprod. (1994) 9:188–91. 10.1093/oxfordjournals.humrep.a138480

  • 15.

    XiGWangWFazlaniSAYaoFYangMHaoJet alC-type natriuretic peptide enhances mouse preantral follicle growth.Reproduction. (2019) 157:445–55. 10.1530/REP-18-0470

  • 16.

    NishikimiTKuwaharaKNakaoK. Current biochemistry, molecular biology, and clinical relevance of natriuretic peptides.J Cardiol. (2011) 57:131–40. 10.1016/j.jjcc.2011.01.002

  • 17.

    ZhangWYangYLiuWChenQWangHWangXet alBrain natriuretic peptide and C-type natriuretic peptide maintain porcine oocyte meiotic arrest.J Cell Physiol. (2015) 230:71–81. 10.1002/jcp.24682

  • 18.

    SatoYChengYKawamuraKTakaeSHsuehAJ. C-type natriuretic peptide stimulates ovarian follicle development.Mol Endocrinol. (2012) 26:1158–66. 10.1210/me.2012-1027

  • 19.

    SantiquetNPapillon-DionEDjenderNGuillemetteCRichardFJ. New elements in the C-type natriuretic peptide signaling pathway inhibiting swine in vitro oocyte meiotic resumption.Biol Reprod. (2014) 91:16. 10.1095/biolreprod.113.114132

  • 20.

    ZhangMSuYQSugiuraKXiaGEppigJJ. Granulosa cell ligand NPPC and its receptor NPR2 maintain meiotic arrest in mouse oocytes.Science. (2010) 330:366–9. 10.1126/science.1193573

  • 21.

    PetersenTSStahlhutMAndersenCY. Phosphodiesterases in the rat ovary: effect of cAMP in primordial follicles.Reproduction. (2015) 150:11–20. 10.1530/REP-14-0436

  • 22.

    AngLHaixiaCHongxiaLRuijiaoLXingpingGHuaixiuW. Supplementation of c-type natriuretic peptide during in vitro growth period benefits the development of murine preantral follicles.Zygote. (2021) 29:150–4. 10.1017/S096719942000060X

  • 23.

    TourainePBeauIGougeonAMeduriGDesrochesAPichardCet alNew natural inactivating mutations of the follicle-stimulating hormone receptor: correlations between receptor function and phenotype.Mol Endocrinol. (1999) 13:1844–54. 10.1210/mend.13.11.0370

  • 24.

    AbelMHWoottonANWilkinsVHuhtaniemiIKnightPGCharltonHM. The effect of a null mutation in the follicle-stimulating hormone receptor gene on mouse reproduction.Endocrinology. (2000) 141:1795–803. 10.1210/endo.141.5.7456

  • 25.

    AchrekarSKModiDNMeherjiPKPatelZMMahaleSD. Follicle stimulating hormone receptor gene variants in women with primary and secondary amenorrhea.J Assist Reprod Genet. (2010) 27:317–26. 10.1007/s10815-010-9404-9

  • 26.

    ConwayGSConwayEWalkerCHoppnerWGromollJSimoniM. Mutation screening and isoform prevalence of the follicle stimulating hormone receptor gene in women with premature ovarian failure, resistant ovary syndrome and polycystic ovary syndrome.Clin Endocrinol (Oxf). (1999) 51:97–9. 10.1046/j.1365-2265.1999.00745.x

  • 27.

    AittomakiKLucenaJLPakarinenPSistonenPTapanainenJGromollJet alMutation in the follicle-stimulating hormone receptor gene causes hereditary hypergonadotropic ovarian failure.Cell. (1995) 82:959–68. 10.1016/0092-8674(95)90275-9

  • 28.

    NakamuraYMaekawaRYamagataYTamuraISuginoN. A novel mutation in exon8 of the follicle-stimulating hormone receptor in a woman with primary amenorrhea.Gynecol Endocrinol. (2008) 24:708–12. 10.1080/09513590802454927

  • 29.

    AllenLAAchermannJCPakarinenPKotlarTJHuhtaniemiITJamesonJLet alA novel loss of function mutation in exon 10 of the FSH receptor gene causing hypergonadotrophic hypogonadism: clinical and molecular characteristics.Hum Reprod. (2003) 18:251–6. 10.1093/humrep/deg046

  • 30.

    DohertyEPakarinenPTiitinenAKiilavuoriAHuhtaniemiIForrestSet alA Novel mutation in the FSH receptor inhibiting signal transduction and causing primary ovarian failure.J Clin Endocrinol Metab. (2002) 87:1151–5. 10.1210/jcem.87.3.8319

  • 31.

    MeduriGTourainePBeauILahunaODesrochesAVacher-LavenuMCet alDelayed puberty and primary amenorrhea associated with a novel mutation of the human follicle-stimulating hormone receptor: clinical, histological, and molecular studies.J Clin Endocrinol Metab. (2003) 88:3491–8. 10.1210/jc.2003-030217

  • 32.

    KuechlerAHauffaBPKoningerAKleinauGAlbrechtBHorsthemkeBet alAn unbalanced translocation unmasks a recessive mutation in the follicle-stimulating hormone receptor (FSHR) gene and causes FSH resistance.Eur J Hum Genet. (2010) 18:656–61. 10.1038/ejhg.2009.244

  • 33.

    LiuHXuXHanTYanLChengLQinYet alA novel homozygous mutation in the FSHR gene is causative for primary ovarian insufficiency.Fertil Steril. (2017) 108:1050–55.e2. 10.1016/j.fertnstert.2017.09.010

  • 34.

    BrambleMSGoldsteinEHLipsonANgunTEskinAGosschalkJEet alA novel follicle-stimulating hormone receptor mutation causing primary ovarian failure: a fertility application of whole exome sequencing.Hum Reprod. (2016) 31:905–14. 10.1093/humrep/dew025

  • 35.

    KatariSWood-TrageserMAJiangHKalynchukEMuzumdarRYatsenkoSAet alNovel inactivating mutation of the FSH receptor in two siblings of Indian origin with premature ovarian failure.J Clin Endocrinol Metab. (2015) 100:2154–7. 10.1210/jc.2015-1401

  • 36.

    FrancaMMLerarioAMFunariMFANishiMYNarcizoAMde MelloMPet alA novel homozygous missense FSHR variant associated with hypergonadotropic hypogonadism in two siblings from a Brazilian family.Sex Dev. (2017) 11:137–42. 10.1159/000477193

  • 37.

    HeWBDuJYangXWLiWTangWLDaiCet alNovel inactivating mutations in the FSH receptor cause premature ovarian insufficiency with resistant ovary syndrome.Reprod Biomed Online. (2019) 38:397–406. 10.1016/j.rbmo.2018.11.011

  • 38.

    ZarinanTMayorgaJJardon-ValadezEGutierrez-SagalRMaravillas-MonteroJLMejia-DominguezNRet alA novel mutation in the FSH receptor (I423T) affecting receptor activation and leading to primary ovarian failure.J Clin Endocrinol Metab. (2021) 106:e534–50. 10.1210/clinem/dgaa782

  • 39.

    BeauITourainePMeduriGGougeonADesrochesAMatuchanskyCet alA novel phenotype related to partial loss of function mutations of the follicle stimulating hormone receptor.J Clin Invest. (1998) 102:1352–9. 10.1172/JCI3795

  • 40.

    DesaiSSRoyBSMahaleSD. Mutations and polymorphisms in FSH receptor: functional implications in human reproduction.Reproduction. (2013) 146:R235–48. 10.1530/REP-13-0351

  • 41.

    KhorSLyuQKuangYLuX. Novel FSHR variants causing female resistant ovary syndrome.Mol Genet Genomic Med. (2020) 8:e1082. 10.1002/mgg3.1082

  • 42.

    LiuHGuoTGongZYuYZhangYZhaoSet alNovel FSHR mutations in Han Chinese women with sporadic premature ovarian insufficiency.Mol Cell Endocrinol. (2019) 492:110446. 10.1016/j.mce.2019.05.005

  • 43.

    SassiADesirJJanssensVMarangoniMDaneelsDGheldofAet alNovel inactivating follicle-stimulating hormone receptor mutations in a patient with premature ovarian insufficiency identified by next-generation sequencing gene panel analysis.F S Rep. (2020) 1:193–201. 10.1016/j.xfre.2020.08.008

  • 44.

    ChengYKawamuraKTakaeSDeguchiMYangQKuoCet alOocyte-derived R-spondin2 promotes ovarian follicle development.FASEB J. (2013) 27:2175–84. 10.1096/fj.12-223412

  • 45.

    VittUAHsuSYHsuehAJ. Evolution and classification of cystine knot-containing hormones and related extracellular signaling molecules.Mol Endocrinol. (2001) 15:681–94. 10.1210/mend.15.5.0639

  • 46.

    ShiYMassagueJ. Mechanisms of TGF-beta signaling from cell membrane to the nucleus.Cell. (2003) 113:685–700. 10.1016/s0092-8674(03)00432-x

  • 47.

    VittUAMazerbourgSKleinCHsuehAJ. Bone morphogenetic protein receptor type II is a receptor for growth differentiation factor-9.Biol Reprod. (2002) 67:473–80. 10.1095/biolreprod67.2.473

  • 48.

    VittUAHayashiMKleinCHsuehAJ. Growth differentiation factor-9 stimulates proliferation but suppresses the follicle-stimulating hormone-induced differentiation of cultured granulosa cells from small antral and preovulatory rat follicles.Biol Reprod. (2000) 62:370–7. 10.1095/biolreprod62.2.370

  • 49.

    VittUAMcGeeEAHayashiMHsuehAJ. In vivo treatment with GDF-9 stimulates primordial and primary follicle progression and theca cell marker CYP17 in ovaries of immature rats.Endocrinology. (2000) 141:3814–20. 10.1210/endo.141.10.7732

  • 50.

    OrisakaMOrisakaSJiangJYCraigJWangYKotsujiFet alGrowth differentiation factor 9 is antiapoptotic during follicular development from preantral to early antral stage.Mol Endocrinol. (2006) 20:2456–68. 10.1210/me.2005-0357

  • 51.

    Dragojevic-DikicSMarisavljevicDMitrovicADikicSJovanovicTJankovic-RaznatovicS. An immunological insight into premature ovarian failure (POF).Autoimmun Rev. (2010) 9:771–4. 10.1016/j.autrev.2010.06.008

  • 52.

    ChiauzziVABussmannLCalvoJCSundbladVCharreauEH. Circulating immunoglobulins that inhibit the binding of follicle-stimulating hormone to its receptor: a putative diagnostic role in resistant ovary syndrome?Clin Endocrinol (Oxf). (2004) 61:46–54. 10.1111/j.1365-2265.2004.02054.x

  • 53.

    MeldrumDRFrumarAMShamonkiIMBenirschkeKJuddHL. Ovarian and adrenal steroidogenesis in a virilized patient with gonadotropin-resistant ovaries and hilus cell hyperplasia.Obstet Gynecol. (1980) 56:216–21.

  • 54.

    ChiauzziVCigorragaSEscobarMERivarolaMACharreauEH. Inhibition of follicle-stimulating hormone receptor binding by circulating immunoglobulins.J Clin Endocrinol Metab. (1982) 54:1221–8. 10.1210/jcem-54-6-1221

  • 55.

    KawanishiKKawamuraKNishinaYGotoAOkadaS. Successful immunosuppressive therapy in insulin resistant diabetes caused by anti-insulin receptor autoantibodies.J Clin Endocrinol Metab. (1977) 44:15–21. 10.1210/jcem-44-1-15

  • 56.

    van WeissenbruchMMHoekAvan Vliet-BleekerISchoemakerJDrexhageH. Evidence for existence of immunoglobulins that block ovarian granulosa cell growth in vitro. A putative role in resistant ovary syndrome?J Clin Endocrinol Metab. (1991) 73:360–7. 10.1210/jcem-73-2-360

  • 57.

    EscobarMECigorragaSBChiauzziVACharreauEHRivarolaMA. Development of the gonadotrophic resistant ovary syndrome in myasthenia gravis: suggestion of similar autoimmune mechanisms.Acta Endocrinol (Copenh). (1982) 99:431–6. 10.1530/acta.0.0990431

  • 58.

    StarupJPedersenH. Hormonal and ultrastructural observations in a case of resistant ovary syndrome.Acta Endocrinol (Copenh). (1978) 89:744–52. 10.1530/acta.0.0890744

  • 59.

    BoardJARedwineFOMoncureCWFrableWJTaylorJR. Identification of differing etiologies of clinically diagnosed premature menopause.Am J Obstet Gynecol. (1979) 134:936–44. 10.1016/0002-9378(79)90869-x

  • 60.

    YanCWangPDeMayoJDeMayoFJElvinJACarinoCet alSynergistic roles of bone morphogenetic protein 15 and growth differentiation factor 9 in ovarian function.Mol Endocrinol. (2001) 15:854–66. 10.1210/mend.15.6.0662

  • 61.

    AriciAMatalliotakisIMKoumantakisGEGoumenouAGNeonakiMAKoumantakisEE. Diagnostic role of inhibin B in resistant ovary syndrome associated with secondary amenorrhea.Fertil Steril. (2002) 78:1324–6. 10.1016/s0015-0282(02)04239-5

  • 62.

    GrynbergMPeltoketoHChristin-MaitreSPoulainMBouchardPFanchinR. First birth achieved after in vitro maturation of oocytes from a woman endowed with multiple antral follicles unresponsive to follicle-stimulating hormone.J Clin Endocrinol Metab. (2013) 98:4493–8. 10.1210/jc.2013-1967

  • 63.

    MuellerABerkholzADittrichRWildtL. Spontaneous normalization of ovarian function and pregnancy in a patient with resistant ovary syndrome.Eur J Obstet Gynecol Reprod Biol. (2003) 111:210–3. 10.1016/s0301-2115(03)00211-2

  • 64.

    AslamMFGilmourKMcCuneGS. Spontaneous pregnancies in patients with resistant ovary syndrome while on HRT.J Obstet Gynaecol. (2004) 24:573–4. 10.1080/01443610410001722707

  • 65.

    NawrothFSudikR. [Pregnancy and hormone replacement therapy in a patient with resistant ovary syndrome].Zentralbl Gynakol. (1999) 121:255–7.

  • 66.

    JequierAM. Conception in the resistant ovary syndrome occurring during hormone replacement therapy: a report of 2 cases.Aust N Z J Obstet Gynaecol. (1990) 30:176–8. 10.1111/j.1479-828x.1990.tb03257.x

  • 67.

    AmosWLJr.Pregnancy in a patient with gonadotropin-resistant ovary syndrome.Am J Obstet Gynecol. (1985) 153:154–5. 10.1016/0002-9378(85)90101-2

  • 68.

    MoriHMatsuokaRAisakaKKigawaT. Sporadic ovulation in a case of resistant ovary syndrome.Asia Oceania J Obstet Gynaecol. (1985) 11:357–62. 10.1111/j.1447-0756.1985.tb00755.x

  • 69.

    LimHTMeindersAEde HaanLDBronkhorstFB. Anovulation presumably due to the gonadotrophin-resistant ovary syndrome.Eur J Obstet Gynecol Reprod Biol. (1984) 16:327–37. 10.1016/0028-2243(84)90161-8

  • 70.

    SassariniJLumsdenMACritchleyHO. Sex hormone replacement in ovarian failure - new treatment concepts.Best Pract Res Clin Endocrinol Metab. (2015) 29:105–14. 10.1016/j.beem.2014.09.010

  • 71.

    BlumenfeldZHalachmiSPeretzBAShmuelZGolanDMaklerAet alPremature ovarian failure–the prognostic application of autoimmunity on conception after ovulation induction.Fertil Steril. (1993) 59:750–5. 10.1016/s0015-0282(16)55854-3

  • 72.

    YangAMCuiNSunYFHaoGM. Letrozole for female infertility.Front Endocrinol (Lausanne). (2021) 12:676133. 10.3389/fendo.2021.676133

  • 73.

    MuZSongJYuYSunZ. Successful live birth in a woman with resistant ovary syndrome treated with letrozole and HMG: a case report.Medicine (Baltimore). (2020) 99:e20199. 10.1097/MD.0000000000020199

  • 74.

    ChangCLChinTHHsuYCHsuehAJ. Whole-ovary laparoscopic incisions improve hormonal response and fertility in patients with extremely poor ovarian response.J Minim Invasive Gynecol. (2022) 29:905–14. 10.1016/j.jmig.2022.04.011

  • 75.

    TanakaYHsuehAJKawamuraK. Surgical approaches of drug-free in vitro activation and laparoscopic ovarian incision to treat patients with ovarian infertility.Fertil Steril. (2020) 114:1355–7. 10.1016/j.fertnstert.2020.07.029

  • 76.

    MenonVEdwardsRLLynchSSButtWR. Luteinizing hormone releasing hormone analogue in treatment of hypergonadotrophic amenorrhoea.Br J Obstet Gynaecol. (1983) 90:539–42. 10.1111/j.1471-0528.1983.tb08964.x

  • 77.

    SilvermanMNSternbergEM. Glucocorticoid regulation of inflammation and its functional correlates: from HPA axis to glucocorticoid receptor dysfunction.Ann N Y Acad Sci. (2012) 1261:55–63. 10.1111/j.1749-6632.2012.06633.x

  • 78.

    LiHChangTMuHXiangW. Case report: birth achieved after effective ovarian stimulation combined with dexamethasone in a patient with resistant ovary syndrome.J Ovarian Res. (2022) 15:42. 10.1186/s13048-022-00976-4

  • 79.

    RiestenbergCAhernSShamonkiM. Follicle-stimulating hormone receptor autoantibody associated primary ovarian insufficiency successfully treated with corticosteroids: a case report.F S Rep. (2020) 1:206–8. 10.1016/j.xfre.2020.09.002

  • 80.

    De VosMSmitzJThompsonJGGilchristRB. The definition of IVM is clear-variations need defining.Hum Reprod. (2016) 31:2411–5. 10.1093/humrep/dew208

  • 81.

    LiYPanPYuanPQiuQYangD. Successful live birth in a woman with resistant ovary syndrome following in vitro maturation of oocytes.J Ovarian Res. (2016) 9:54. 10.1186/s13048-016-0263-6

  • 82.

    KornilovNVPavlovaMNYakovlevPP. The live birth in a woman with resistant ovary syndrome after in vitro oocyte maturation and preimplantation genetic testing for aneuploidy.J Assist Reprod Genet. (2021) 38:1303–9. 10.1007/s10815-021-02085-5

  • 83.

    GalvaoASegersISmitzJTournayeHDe VosM. In vitro maturation (IVM) of oocytes in patients with resistant ovary syndrome and in patients with repeated deficient oocyte maturation.J Assist Reprod Genet. (2018) 35:2161–71. 10.1007/s10815-018-1317-z

  • 84.

    FlageoleCToufailyCBernardDJAtesSBlaisVChenierSet alSuccessful in vitro maturation of oocytes in a woman with gonadotropin-resistant ovary syndrome associated with a novel combination of FSH receptor gene variants: a case report.J Assist Reprod Genet. (2019) 36:425–32. 10.1007/s10815-018-1394-z

  • 85.

    SamsamiADavoodiSGhasmpourLMoradi AlamdarlooSRahmatiJKarimianA. Gonadotropin-resistant ovary syndrome presented with secondary amenorrhea and infertility: a case report.Iran J Med Sci. (2020) 45:140–2. 10.30476/ijms.2019.81965

  • 86.

    LeHLHoVNALeTTNTranVTTMaMPQLeAHet alLive birth after in vitro maturation in women with gonadotropin resistance ovary syndrome: report of two cases.J Assist Reprod Genet. (2021) 38:3243–9. 10.1007/s10815-021-02355-2

  • 87.

    EftekharMMohammadiBTabibnejadNRaziMH. Early oocyte triggering followed by in vitro maturation is a good approach in women with resistance ovary syndrome: a case-series.Int J Reprod Biomed. (2021) 19:569–74. 10.18502/ijrm.v19i6.9378

  • 88.

    SpiliotisBE. Growth hormone insufficiency and its impact on ovarian function.Ann N Y Acad Sci. (2003) 997:77–84. 10.1196/annals.1290.009

  • 89.

    HomburgRFarhiJ. Growth hormone and reproduction.Curr Opin Obstet Gynecol. (1995) 7:220–3. 10.1097/00001703-199506000-00012

  • 90.

    VilaGLugerA. Growth hormone deficiency and pregnancy: any role for substitution?Minerva Endocrinol. (2018) 43:451–7. 10.23736/S0391-1977.18.02834-1

  • 91.

    LiuFTWuZYanJNormanRJLiR. The potential role of growth hormone on the endometrium in assisted reproductive technology.Front Endocrinol (Lausanne). (2020) 11:49. 10.3389/fendo.2020.00049

  • 92.

    LucyMC. Growth hormone regulation of follicular growth.Reprod Fertil Dev. (2011) 24:19–28. 10.1071/RD11903

  • 93.

    RutkowskiKSowaPRutkowska-TalipskaJKuryliszyn-MoskalARutkowskiR. Dehydroepiandrosterone (DHEA): hypes and hopes.Drugs. (2014) 74:1195–207. 10.1007/s40265-014-0259-8

  • 94.

    TriantafyllidouOSigalosGVlahosN. Dehydroepiandrosterone (DHEA) supplementation and IVF outcome in poor responders.Hum Fertil (Camb). (2017) 20:80–7. 10.1080/14647273.2016.1262065

  • 95.

    ZangmoRSinghNKumarSVanamailPTiwariA. Role of dehydroepiandrosterone in improving oocyte and embryo quality in IVF cycles.Reprod Biomed Online. (2014) 28:743–7. 10.1016/j.rbmo.2014.01.019

  • 96.

    Dragojevic DikicSVasiljevicMJovanovicADikicSJurisicASrbinovicLet alPremature ovarian insufficiency - novel hormonal approaches in optimizing fertility.Gynecol Endocrinol. (2020) 36:162–5. 10.1080/09513590.2019.1640203

  • 97.

    OzcilMD. Dehydroepiandrosterone supplementation improves ovarian reserve and pregnancy rates in poor responders.Eur Rev Med Pharmacol Sci. (2020) 24:9104–11. 10.26355/eurrev_202009_22856

  • 98.

    WongQHYYeungTWYYungSSFKoJKYLiHWRNgEHY. The effect of 12-month dehydroepiandrosterone supplementation on the menstrual pattern, ovarian reserve markers, and safety profile in women with premature ovarian insufficiency.J Assist Reprod Genet. (2018) 35:857–62. 10.1007/s10815-018-1152-2

  • 99.

    MelnickAPRosenwaksZ. Oocyte donation: insights gleaned and future challenges.Fertil Steril. (2018) 110:988–93. 10.1016/j.fertnstert.2018.09.021

  • 100.

    HeaneyRPWeaverCM. Calcium and vitamin D.Endocrinol Metab Clin North Am. (2003) 32:181–94; vii–viii. 10.1016/s0889-8529(02)00063-4

  • 101.

    PrasadSTiwariMPandeyANShrivastavTGChaubeSK. Impact of stress on oocyte quality and reproductive outcome.J Biomed Sci. (2016) 23:36.

Summary

Keywords

resistant ovary syndrome, etiology, pathogenesis, infertility, management strategies

Citation

Mu Z, Shen S and Lei L (2022) Resistant ovary syndrome: Pathogenesis and management strategies. Front. Med. 9:1030004. doi: 10.3389/fmed.2022.1030004

Received

28 August 2022

Accepted

04 October 2022

Published

19 October 2022

Volume

9 - 2022

Edited by

Sarah M. Cohen, Hadassah Medical Center, Israel

Reviewed by

Anat Klement, Tel Aviv University, Israel; Jing-Yan Song, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, China

Updates

Copyright

*Correspondence: Lei Lei,

This article was submitted to Obstetrics and Gynecology, a section of the journal Frontiers in Medicine

Disclaimer

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.

Outline

Figures

Cite article

Copy to clipboard


Export citation file


Share article

Article metrics