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Efficacy and safety of ganirelix acetate versus leuprolide acetate in women undergoing controlled ovarian hyperstimulation.

Author(s): Fluker M, Grifo J, Leader A, Levy M, Meldrum D, Muasher SJ, Rinehart J, Rosenwaks Z, Scott RT Jr, Schoolcraft W, Shapiro DB; North American Ganirelix Study Group.

Affiliation(s): Genesis Fertility Center, Vancouver, British Columbia, Canada.

Publication date & source: 2001, Fertil Steril. , 75(1):38-45

OBJECTIVE: To assess the efficacy, safety, and local tolerance of ganirelix acetate for the inhibition of premature luteinizing hormone (LH) surges in women undergoing controlled ovarian hyperstimulation (COH). DESIGN: Phase III, multicenter, open-label randomized trial. SETTING: In vitro fertilization (IVF) centers in North America. PATIENT(S): Healthy female partners (n = 313) in subfertile couples for whom COH and IVF or intracytoplasmic sperm injection were indicated. INTERVENTION(S): Patients were randomized to receive one COH cycle with ganirelix or the reference treatment, a long protocol of leuprolide acetate in conjunction with follitropin-beta for injection. OUTCOME MEASURE(S): Number of oocytes retrieved, pregnancy rates, endocrine variables, and safety variables. RESULT(S): The mean number of oocytes retrieved per attempt was 11.6 in the ganirelix group and 14.1 in the leuprolide group. Fertilization rates were 62.4% and 61.9% in the ganirelix and leuprolide groups, respectively, and implantation rates were 21.1% and 26.1%. Clinical and ongoing pregnancy rates per attempt were 35.4% and 30.8% in the ganirelix group and 38.4% and 36.4% in the leuprolide acetate group. Fewer moderate and severe injection site reactions were reported with ganirelix (11.9% and 0.6%) than with leuprolide (24.4% and 1.1%). CONCLUSION(S): Ganirelix is effective, safe, and well tolerated. Compared with leuprolide acetate, ganirelix therapy has a shorter duration and fewer injections but produces a similar pregnancy rate.

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