目的 探討3種不同助孕方案在≥40歲婦女體外受精-胚胎移植（IVF-ET）周期中的臨床效果。 方法 回顧性分析2010年8月－2012年2月期間，于四川大學華西第二醫院生殖中心行IVF-ET助孕、年齡≥40歲婦女共245個周期的臨床資料，排除一側卵巢缺如患者3例，余242個周期根據助孕方案不同分為3組：拮抗劑組（GnRH-A方案組）44個周期、長方案組109個周期及短方案組89個周期，比較3種方式助孕的臨床效果。 結果 3組均無早發黃體生成素峰；長方案組應用促性腺激素（Gn）的時間最長，應用Gn數量最多，獲得最高的獲卵數及獲胚數（P＜0.05）；3組的受精率、優胚率、冷凍胚胎數、周期取消率、卵巢過度刺激綜合征發生率、早期流產率均無統計學意義（P＞0.05），短方案組的種植率及臨床妊娠率最低（P＜0.05）。 結論 GnRH-a長方案在≥40歲婦女的IVF-ET周期中具有較好的臨床結局，在≥40歲婦女IVF-ET周期中具有與長方案相似的結局，并且可以減少Gn使用量，提高卵泡及胚胎質量，短方案組對≥40歲婦女臨床效果較差。
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.