Dual trigger with gonadotropin-releasing hormone agonist and standard dose human chorionic gonadotropin to improve oocyte maturity rates

Abstract

To evaluate the percentage (%) of mature oocytes retrieved in patients with a previous history of >25% immature oocytes retrieved who were triggered with gonadotropin-releasing hormone agonist (GnRH-a) and human chorionic gonadotropin (hCG) to induce oocyte maturation. Retrospective cohort study. A university-based tertiary fertility center. Patients with a history of >25% immature oocytes retrieved in a prior invitro fertilization cycle who were triggered with GnRH-a and hCG 5,000 IU or 10,000 IU in a subsequent cycle from January 2008 through February2012. Dual trigger of GnRH-a and hCG 5,000 or 10,000 IU. Percent of mature oocytes retrieved and fertilization rate. The proportion of mature oocytes retrieved was significantly higher with a dual trigger compared with the subject's previous cycle (75.0%, interquartile range 55.6%-80.0% vs. 38.5%, interquartile range 16.7%-55.6%). The odds of a mature oocyte retrieved for patients who received a dual trigger was 2.51 times higher after controlling for stimulation protocol, hCG dose, gonadotropin dose, and oocyte retrieval time interval (odds ratio 2.51; confidence interval 1.06-5.96). The implantation, clinical, and ongoing pregnancy rates for the dual trigger were 11.8%, 26.1%, and 17.4%, respectively. In patients with a low percentage of mature oocytes retrieved who are triggered with a combination of GnRH-a and hCG, the % of mature oocytes retrieved improved. invitro fertilization outcomes, however, remain poor, suggesting an underlying oocyte dysfunction.