late spontaneous abortion

Results:The factors were:Operating frequency of cervical,premature rupture of membrane,twin pregnancies. Selection embryo reduction was the correlation factor of late spontaneous abortion,too.
结果:ART后晚期流产和早产的相关因素有宫颈操作次数、胎膜早破以及双胎妊娠,选择性减胎术亦可增加晚期流产的危险。