ORIGINAL RESEARCH article
Front. Endocrinol.
Sec. Reproduction
Volume 16 - 2025 | doi: 10.3389/fendo.2025.1547694
The effect of atosiban on pregnancy outcomes in different FET cycles: a single-center matched retrospective cohort study
Provisionally accepted
- 1The Affiliated Taizhou People's Hospital, Nanjing Medical University, Taizhou, China
- 2Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
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The debate over the clinical role of atosiban in assisted reproduction continues. The purpose of our study was to explore the efficacy of atosiban on pregnancy outcomes of patients undergoing frozen embryo transfer. Methods A total of 1615 frozen embryo transfer cycles between 1 January 2019 and 31 December 2022 were included in this retrospective cohort study. Patients were divided into two groups based on the administration of atosiban before frozen-thawed embryo transfer (FET): the atosiban group (n=339) and the control group (n=1276). The primary outcome was live birth, while the secondary outcomes were biochemical pregnancy, clinical pregnancy, abortion, and ectopic pregnancy.After propensity score matching (PSM), both univariable and multivariable analyses showed atosiban was not linked to an increased likelihood of biochemical pregnancy or clinical pregnancy, nor a reduced risk of abortion or ectopic pregnancy (p>0.05). When controlling for confounding factors, maternal age (OR, 0.95; 95% CI, 0.91-0.98; p=0.004), history of failed ETs (1: OR, 0.72; 95% CI, 0.53-0.99; p=0.040; ≥2: OR, 0.65; 95% CI, 0.46-0.92; p=0.015), embryo stage (OR, 2.45; 95% CI, 1.85-3.25; p=0.000) and endometrial thickness (OR, 1.12; 95% CI, 1.01-1.24; p=0.025) were found to be associated with the likelihood of live birth. No beneficial effect of atosiban was observed in any of the subgroups based on maternal age, number of previous embryo transfers (ETs), endometrial thickness, or embryo stage in the subgroup analysis of the primary outcome.These results suggested that adding atosiban in the standard FET cycles might not improve the live birth rate. To confirm this conclusion, more thorough, prospective randomized controlled studies of sizable sample sizes with good design are required.
Keywords: Atosiban, live birth rate, Frozen-thawed embryo transfer, Assisted reproduction, endometrial peristalsis
Received: 18 Dec 2024; Accepted: 09 Jun 2025.
Copyright: © 2025 Yang, Luo, Qin, Zhu, Zhu, Yang, Zhang, Wang and Ge. 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) or licensor 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.
* Correspondence:
Jia Wang, The Affiliated Taizhou People's Hospital, Nanjing Medical University, Taizhou, 210029, China
Hongshan Ge, The Affiliated Taizhou People's Hospital, Nanjing Medical University, Taizhou, 210029, China
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