ORAL CONTRACEPTIVE PILL PRETREATMENT IN OVARIAN STIMULATION WITH GnRH ANTAGONISTS FOR IN VITRO FERTILIZATION: A COMPARATIVE STUDY
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Objective To evaluate whether oral contraceptive pill (OCP) pretreatments in gonadotropin-releasing hormone (GnRH) antagonist ovarian stimulation protocols takes positive effects on in vitro fertilization (IVF) outcomes in respect to retrieved oocyte number, oocyte maturation rate, fertilization rate, good quality embryo rate, cycle cancellation rate, pregnancy rate and clinical abortion rate. Methods A total of 194 cycles using GnRH antagonist protocol was performed at infertility clinic of our institute from September 1st, 2009 to February 28th, 2010. The medical records of GnRH antagonist protocols for IVF with or without OCP pretreatment in our IVF unit were retrospectively analyzed. We compared the IVF outcomes between OCP pretreated (n=41) and no pretreatment group (n=153). Results In cycles with OCP pretreated group, the total used dosage of gonadotropin (3019.38±1379.00 IU) were higher than that of no pretreatment group (2551.52 ± 1157.05 IU, P = 0.054). The duration of ovarian stimulation in OCP pretreated group (11.5 ± 2.0)was signifi cantly longer than that of control group (9.5 ± 1.9, P = 0.000). The number of gained total embryo (2.8±0.9 vs. 2.5±1.0,P = 0.055) and fertilization rate (77.2% vs. 65.5%, P = 0.017) were significantly higher in OCP pretreated group. There is no signifi cant difference in pregnancy rate between two groups (39.4% vs. 30.0%, P = 0.304). Conclusion OCP pretreatment before GnRH antagonist protocol for IVF appears not to have reliable benefi t in terms of IVF outcomes. Wellcontrolled and large-scaled studies are needed.
Abstract
Objective To evaluate whether oral contraceptive pill (OCP) pretreatments in gonadotropin-releasing hormone (GnRH) antagonist ovarian stimulation protocols takes positive effects on in vitro fertilization (IVF) outcomes in respect to retrieved oocyte number, oocyte maturation rate, fertilization rate, good quality embryo rate, cycle cancellation rate, pregnancy rate and clinical abortion rate. Methods A total of 194 cycles using GnRH antagonist protocol was performed at infertility clinic of our institute from September 1st, 2009 to February 28th, 2010. The medical records of GnRH antagonist protocols for IVF with or without OCP pretreatment in our IVF unit were retrospectively analyzed. We compared the IVF outcomes between OCP pretreated (n=41) and no pretreatment group (n=153). Results In cycles with OCP pretreated group, the total used dosage of gonadotropin (3019.38±1379.00 IU) were higher than that of no pretreatment group (2551.52 ± 1157.05 IU, P = 0.054). The duration of ovarian stimulation in OCP pretreated group (11.5 ± 2.0)was signifi cantly longer than that of control group (9.5 ± 1.9, P = 0.000). The number of gained total embryo (2.8±0.9 vs. 2.5±1.0,P = 0.055) and fertilization rate (77.2% vs. 65.5%, P = 0.017) were significantly higher in OCP pretreated group. There is no signifi cant difference in pregnancy rate between two groups (39.4% vs. 30.0%, P = 0.304). Conclusion OCP pretreatment before GnRH antagonist protocol for IVF appears not to have reliable benefi t in terms of IVF outcomes. Wellcontrolled and large-scaled studies are needed.
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