1,500 IU human chorionic gonadotropin administered at oocyte retrieval rescues the luteal phase when gonadotropin-releasing hormone agonist is used for ovulation induction: a prospective, randomized, controlled study

Objective: To prospectively assess the reproductive Outcome with a small bolus of hCG administered on the day of oocyte retrieval after ovulation induction with a GnRH agonist (GnRHa). Design: Prospective, randomized trial. Setting: Three hospital-based IVF clinics. Patient(s): Three hundred five WF/intracytoplasmic sperm injection patients after a GnRH antagonist protocol. Intervention(s): Ovulation induction was performed with either 10,000 IU hCG or 0.5 mg GnRHa (buserelin) supplemented with 1,500 IU hCG on the day of oocyte retrieval. Main Outcome Measure(s): Reproductive outcome in the two groups. Result(s): No significant differences were seen regarding positive hCG/ET rate (48% and 48%), ongoing pregnancy rate (26% and 33%), delivery rate (24% and 31%), and rate of early pregnancy loss (21% and 17%) between the GnRHa and 10,000 IU hCG groups, respectively. Conclusion(s): A small bolus of hCG in the GnRHa group secured the luteal phase, resulting in a comparable reproductive Outcome in the two groups. However, a nonsignificant difference of 7% in delivery rates justifies further studies to refine the use of GnRHa for Ovulation induction. (Fertil Steril (R) 2010:93:847-54. (C)2010 by American Society for Reproductive Medicine.)