Ovarian pregnancy in polycystic ovary syndrome: a case report.

A case is reported of ectopic pregnancy occurring within an ovary with the morphologic appearance of polycystic ovary syndrome (PCOS). The hyperandrogenism and elevated LH/FSH ratio characteristic of PCOS were noted 2 months after removal of the ovarian gestation. The thickened ovarian cortex of the PCOS ovary and a defect in oocyte-cumulus complex detachment within the follicle are suggested as possible factors contributing to intraovarian fertilization in PCOS.