Assisted Reproductive Technology in the Presence of Polycystic Ovary Syndrome: Current Evidence and Knowledge Gaps.

OBJECTIVE: In this narrative review we discuss the current evidence as well as the knowledge gaps concerning assisted reproductive technology (ART) indications, protocols, and results in the presence of polycystic ovary syndrome (PCOS).

METHODS: An electronic literature search was performed for English-language publications in the last decade in databases such as PubMed, Medline, Web of Sciences, Embase and Scopus.

RESULTS: We found evidence that ovarian steroidogenesis and folliculogenesis are deeply altered by PCOS but, nevertheless, oocyte quality and pregnancy rates following ART are not affected. Patients with PCOS are more sensitive to the action of exogenous gonadotropins and more likely to develop ovarian hyperstimulation syndrome. This risk can be mitigated by the adoption of GnRH antagonist protocols for pituitary blockade and ovarian stimulation, along with frozen embryo transfer, without compromising the odds of achieving a live birth. Pregnancy complications like miscarriage, gestational diabetes, preeclampsia and very preterm birth are more frequent in the presence of PCOS, requiring more intense prenatal care. It remains uncertain whether weight reduction or insulin sensitizers used before ART are beneficial for the treatment outcomes.

CONCLUSION: While PCOS is not a drawback for ART treatments, the patients need special care to avoid complications. More in-depth studies are needed to uncover the mechanisms of follicular growth, gamete maturation and endometrial differentiation during ART procedures in the presence of PCOS.