ABSTRACT
Objective To compare in vitro fertilization and embryo transfer( IVF-ET ) outcome of gonadotropin-releasing hormone( GnRH ) antagonist protocol and GnRH agonist long protocol in patients with polycystic ovary syndrome ( PCOS)and to provide reference for rational selection of ovulation stimulation protocol for PCOS patients. Methods One hundred and four patients with PCOS who underwent IVF-ET were randomly divided into two groups. In the study group,41 patients were subjected to the GnRH antagonist protocol;In the control group,63 patients were subjected to a long protocol of GnRH agonist. Doses and duration of gonadotropin therapy,the thickness of endometrium and the profile of hormone level on the day of HCG administration,the number of retrieved oocytes,the ratio of fertilization,the ratio of cleavage,the ratio of the good quantity embryos,implantation rate of embryo,pregnancy rate,the cycle cancellation rate and the incidence rate of ovarian hyperstimulation syndrome( OHSS)were recorded. Results The IVF-ET outcome of the two groups was similar with respects to the number of oocytes,the ratio of fertilization,the ratio of cleavage,implantation rate of embryo and the pregnancy rate( P﹥0. 05). Significant differences were found(P﹤0. 05)between the two groups regarding to the doses and duration of gonadotropin therapy,the levels of serum E2 and LH on the day of HCG administration,and the cycle cancellation rate. The incidence rate of OHSS was not significantly different ( 2. 44% vs. 12. 70%) between the two groups. Conclusion The duration of gonadotropins administration,the cycle cancellation rate,incidence of OHSS and the financial burdern are reduced in patients treated with GnRH antagonist. The growth of follicle,the ratio of fertilization,the ratio of cleavage,implantation rate of embryo and the pregnancy rate are not different between the two methods. The GnRH antagonist protocol is optimal for patients with PCOS.