Reproductive outcomes in infertile women with endometriosis undergoing ART.

Background Endometriosis-related infertility and its treatment with assisted reproductive technologies (ART) have been broadly researched. Yet, underlying mechanisms of infertility, particularly in the absence of tubal dysfunction, remain unclear. While the impact of inflammatory milieu on the ovary and/or endometrium has been indicated as a contributing factor, recent evidence from euploid transfers and donor cycles questions the extent of these effects. Moreover, the frequent coexistence of other confounders, such as adenomyosis, further complicates the clinical picture, making it difficult to isolate the specific impact of endometriosis on ART outcomes. Objectives To evaluate the influence of endometriosis on various aspects of ART, including oocyte competence, ART success and whether surgical or medical treatments improve these. Methods We primarily focused on recent high-quality sources, including systematic reviews, large-scale observational studies, and meta-analyses, to ensure a robust and reliable synthesis of the available evidence. Outcome While oocyte yield can decrease in the presence of an endometrioma or history of endometrioma excision, oocyte quality, early embryo development indicators, aneuploidy rates, and clinical outcomes of endometriosis patients do not differ from other infertility diagnoses in ART settings. Surgical treatments and hormonal suppression before ART do not seem to improve outcomes. Ovarian stimulation for ART does not seem to exacerbate endometriosis. Conclusions and Outlook Endometriosis, despite its high prevalence among infertile patients, does not inherently impair ART success, except in cases where ovarian reserve is compromised due to ovarian disease or its surgical treatment. The causal link between endometriosis and infertility remains an enigma, and future studies should continue to explore this association with other confounding factors.