目的 探讨3种不同助孕方案在≥40岁妇女体外受精-胚胎移植（IVF-ET）周期中的临床效果。 方法 回顾性分析2010年8月－2012年2月期间，于四川大学华西第二医院生殖中心行IVF-ET助孕、年龄≥40岁妇女共245个周期的临床资料，排除一侧卵巢缺如患者3例，余242个周期根据助孕方案不同分为3组：拮抗剂组（GnRH-A方案组）44个周期、长方案组109个周期及短方案组89个周期，比较3种方式助孕的临床效果。 结果 3组均无早发黄体生成素峰；长方案组应用促性腺激素（Gn）的时间最长，应用Gn数量最多，获得最高的获卵数及获胚数（P＜0.05）；3组的受精率、优胚率、冷冻胚胎数、周期取消率、卵巢过度刺激综合征发生率、早期流产率均无统计学意义（P＞0.05），短方案组的种植率及临床妊娠率最低（P＜0.05）。 结论 GnRH-a长方案在≥40岁妇女的IVF-ET周期中具有较好的临床结局，在≥40岁妇女IVF-ET周期中具有与长方案相似的结局，并且可以减少Gn使用量，提高卵泡及胚胎质量，短方案组对≥40岁妇女临床效果较差。
ObjectiveTo compare the clinical outcomes of different pituitary down regulation protocols with gonadotropin-releasing hormone agonist (GnRH-a) in patients undergoing in vitro fertilization and embryo transfer (IVF-ET) treatment. MethodsThe clinical data of 358 IVF cycles in women at 40 years old or younger from November 2012 to January 2013 in the West China Second University Hospital were analyzed retrospectively. All the 358 cycles were divided into two groups, according to whether the leading follicle diameter was <14 mm (group A, 158 cycles) or ≥14 mm (group B, 200 cycles) after discontinuing the GnRH-a. The clinical outcomes were compared between the two groups. ResultsCompared with group B, the amount of gonadotropins used was significantly more, and the time of gonadotropin use was also significantly longer in group A (P<0.05). However, the serum level of estradiol (E2), progesterone (P) and Luteinizing hormone (LH), incidence of premature P rise, retrieved ovum number, the rates of implantation, clinical pregnancy, miscarriage and live birth did not significantly differ between the two groups (P>0.05). ConclusionDiscontinuing the use of GnRH-a in early stage of controlled ovarian stimulation can keep effective pituitary down regulation and it has the same optimal clinical outcomes in patients undergoing IVF-ET.