Follicular stimulation for in vitro fertilization using pituitary suppression and human menopausal gonadotropins.

Multiple follicular stimulation is a prerequisite to the efficient use of in vitro fertilization (IVF) and gamete intrafallopian transfer (GIFT). For some individuals, however, this stimulation may be difficult using standard superovulation protocols because of dominant follicle formation, suboptimal estradiol response, or premature luteinizing hormone surge. A group of such individuals with several previous failed attempts at superovulation were studied. Follicular stimulation was accomplished using a long-acting agonist of gonadotropin-releasing hormone (GnRH) for pituitary suppression followed by human menopausal gonadotropin (hMG) for follicular stimulation. Fourteen cycles (12 IVF, 2 GIFT) were completed in 12 individuals. There were no cycle cancellations. Mean number of prior cycle cancellations per patient was 3.1 +/- 0.4. Mean number of mature oocytes recovered was 3.9 +/- 0.5. Two pregnancies resulted. Pituitary suppression with a long-acting agonist of GnRH followed by hMG appears to be an effective adjunct to current superovulation regimens.