Abstract

Ovarian cysts persisting after the onset of menses were demonstrated by ultrasound (US) in 40 of 71 (56%) nonconception cycles following ovulation induction with human menopausal gonadotropins (hMG) and human chorionic gonadotropin (hCG). Persistent cysts were self-limited and all resolved spontaneously within two cycles. They developed more frequently during stimulation cycles with (1) higher mean pre-hCG serum estradiol (E2), (2) a greater number of medium and large follicles at peak pre-hCG E2, and (3) a larger leading follicle diameter at peak pre-hCG E2. Persistent ovarian cysts frequently occurred despite a peak pre-hCG E2 lower than 1000 pg/ml. Although ovarian enlargement in the presence of cysts exceeded 5 X 5 cm in 25% of cases, no patient developed clinical symptoms of ovarian hyperstimulation syndrome (OHSS). Repeated induction of ovulation with hMG/hCG in the presence of nonfunctional, persistent cysts resulted in pregnancies in 6 of 15 cases (40%). Asymptomatic persistent ovarian cysts frequently follow an hMG/hCG regimen and, when nonfunctional, are not a contraindication to repeated ovarian stimulation. Persistent ovarian cysts appear to be an attenuated form of OHSS.

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