Endometriosis reduces ovarian response in controlled ovarian hyperstimulation independent of AMH, AFC, and women’s age measured by follicular output rate (FORT) and number of oocytes retrieved

Purpose To determine the influence of endometriosis on the ovarian response during controlled ovarian hyperstimulation measured by number of oocytes retrieved and the follicular output rate (FORT).

A retrospective, single center study included 96 women, who underwent ICSI treatments for male factor infertility according to World Health Organisation between 2016 until 2018. A total of 96 patients were included in the study with 205 fresh ICSI cycles. The study group included 26 patients with endometriosis after surgical and medical treatment; the control group included 70 patients without endometriosis. The women with endometriosis underwent 47 and the control group 158 ICSI cycles. Women underwent fresh intracytoplasmatic sperm injection cycles after controlled ovarian hyperstimulation following a GnRH-antagonist protocol. The FORT was calculated as the ratio of pre-ovulatory follicle count × 100/small antral follicle count at baseline.

A lower number of retrieved oocytes (5.89 vs. 7.25, p = 0.045), lower FORT (75.67 vs. 94.63, p = 0.046), lower number of metaphase II oocytes (4.87 vs. 6.04, p = 0.046), and lower fertilization rate after intracytoplasmatic sperm injection (40.61 vs. 57.76, p = 0.003) were found in women with endometriosis compared to women without endometriosis. The number of oocyctes retrieved was 0.71 lower in the group with endometriosis than in the group without (p = 0.026). The FORT was 24.55% lower in the group with endometriosis (p = 0.025).

Endometriosis reduces the FORT and the number of metaphase-II oocytes after controlled ovarian hyperstimulation independly of women’s age, antral follicle count and anti-Müllerian hormone. Similar content being viewed by others

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The authors wish to thank Dr. Thomas Lehmann, Institute of Medical Statistics, Informatics and Documentation, University Hospital, Friedrich-Schiller-University Jena, Germany for assistance with statistical analysis. Author information Authors and Affiliations Contributions KN: protocol/project development, data collection and data management and manuscript writing/editing. DB: data collection. RS: data collection. JJ-C: statistics and data management. IH: providing the embryological data. KB: project development. IBR: manuscript writing/editing. Corresponding author Ethics declarations Conflict of interest The authors have no conflicts of interest to declare. Additional information Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Rights and permissions About this article Cite this article Nicolaus, K., Bräuer, D., Sczesny, R. et al. Endometriosis reduces ovarian response in controlled ovarian hyperstimulation independent of AMH, AFC, and women’s age measured by follicular output rate (FORT) and number of oocytes retrieved. Arch Gynecol Obstet 300, 1759–1765 (2019). https://doi.org/10.1007/s00404-019-05337-z Received: Accepted: Published: Version of record: Issue date: DOI: https://doi.org/10.1007/s00404-019-05337-z