随着诱发排卵药物的应用和辅助生殖技术如体外授精(IVF)、配子输卵管移植(GIFT)的开展,妊娠率提高,多胎妊娠成为重要的并发症。Croft和Brinsdcn 1989年统计1071例GIFT,送入卵子数≤4组的,妊娠率是21.4％,多胎妊娠率是17.3％,送入卵子数≥5组的妊娠率是40.3％,多胎妊娠率是32.3％。多胎妊娠发生率远远高于自然发生率。多胎的母亲在妊娠期和分娩时有多种并发症和危险性,随着胎数的增加,围产儿死亡及发病也明显增加。胎数≥3时,妊娠母亲及家庭对妊娠成功感到高兴,同时 With the introduction of ovulation induction drugs and assisted reproductive technologies such as IVF and gametocyte fallopian tube transplantation (GIFT), pregnancy rates have increased and multiple pregnancies have become an important complication. Croft and Brinsdcn 1989 statistics 1071 cases of GIFT, into the number of eggs less than 4 groups, the pregnancy rate was 21.4%, multiple pregnancy rate was 17.3%, the number of eggs into the group of 5 pregnancy rate was 40.3%, multiple pregnancy rate 32.3%. The incidence of multiple pregnancies is much higher than the natural incidence. Multiple mothers have multiple complications and risks during pregnancy and childbirth. As the number of mothers increases, perinatal mortality and morbidity also increase significantly. When the number of births ≥ 3, pregnant mothers and their families are happy about the success of pregnancy, meanwhile