冻融胚胎移植的临床应用

目的：积累体外受精冻融胚胎移植技术的经验。方法：对20例在体外受精形成的多个胚胎，在移植后将剩余胚胎全部冷冻保存，如本周期未获妊娠，在以后的周期再行解冻移植。结果：20例进行20个周期的冻融胚胎移植，获临床妊娠7例，临床妊娠率为35％。其中自然周期移植13例获临床妊娠5例，妊娠率为38．5％；激素替代周期7例，获临床妊娠2例，妊娠率为28．5％。首例冻融胚胎于2002年6月28日孕38周分娩一男婴，新生儿发育良好。结论：采取冻融胚胎移植可提高累积妊娠率，并可减少卵巢过度刺激综合征及多胎妊娠的发生。

Clinical application of cryopreservation thawed embryos

Objective To accumulate experience of cryopreservation thawed embryo transfer in vitro fertilization. Methods The surplus embryos after in vitro fertilization and embryo transplantation (in 20 cases) were all cryopreservated. Given invalidated pregnancy, they would be thawed in a later cycle for another transplantation. Results Among the 20 cases who had received cryopreservation thawed embryo transplantation for 20 cycles, 7 cases achieved clinical pregnancy (with the rate of 35%). Out of the 20 cases, 13 cases received natural-cycle transplantation and 5 of them achieved clinical pregnancy (with the rate of 38.5 %); 7 cases received hormone substitution transplantation and 2 of them achieved clinical pregnancy (with the rate of 28.5 %). In the first case of cryopreservation thawed embryo pregnancy, a boy infant was delivered after 38 weeks conception and the neonate developed well. Conclusion Cryopreservation thawed embryo transplantation can increase the chance of accumutive pregnancy while curb the occurrence of multi pregnancy and the syndrome of excessive ovary stimulation.