Comparison of luteal estradiol patch and gonadotropin-releasing hormone antagonist suppression protocol before gonadotropin stimulation versus microdose gonadotropin-releasing hormone agonist protocol for patients with a history of poor in vitro fertiliza

ObjectiveTo compare IVF outcomes in poor-responder patients undergoing stimulation after luteal phase E2 patch/GnRH antagonist (LPG) protocol versus microdose GnRH agonist protocol.DesignRetrospective analysis.SettingUniversity-based IVF center.Patient(s)Forty-five women undergoing ovarian stimulation for IVF using the LPG protocol were compared with 76 women stimulated with the microdose GnRH agonist protocol from May 2005 to April 2006.Main Outcome Measure(s)Cancellation rate, number of oocytes retrieved, and clinical pregnancy rates.Result(s)The mean number of oocytes (9.1 ± 4.1 vs. 8.9 ± 4.3) and mature oocytes (6.7 ± 3.5 vs. 6.8 ± 3.1) retrieved were similar, as were the fertilization rates (70.0% ± 24.2% vs. 69.9% ± 21.5%) and the number of embryos transferred (2.5 ± 1.1 vs. 2.7 ± 1.3). The cancellation rate was not significantly different between the groups (13/45, 28.9% vs. 23/76, 30.3%). Likewise, there were no significant differences among the implantation rate (15.0% vs. 12.5%), clinical pregnancy rate (43.3% vs. 45.1%), and ongoing pregnancy rate per transfer (33.3% vs. 26.0%) between both groups.Conclusion(s)This study demonstrates that the use of an E2 patch and a GnRH antagonist during the preceding luteal phase in patients with a history of failed cycles can provide similar IVF outcomes when compared with the microdose GnRH agonist protocol.