A case of fetal death induced by blood vessel rupture and bleeding of placental presentation 前置血管破裂出血致胎儿死亡1例
The pregnancy women with other complications were excluded in the observation, such as hypertension, placental presentation, placental abruption, superfoetation, genital malformation, fetal malformation, and also the pregnant women using antibiotic were not included. 筛除其他妊娠合并症、并发症(如妊娠期高血压疾病、前置胎盘、胎盘早剥、多胎、生殖道畸形、胎儿畸形等)及孕期曾使用抗菌素的孕妇。