1　前置胎盘对母儿的影响正常妊娠时 ,胎盘附着于子宫体的前壁、后壁或侧壁 ,如果胎盘附着于子宫下段部分或全部覆盖在子宫颈内口上 ,则称为前置胎盘。前置胎盘是妊娠晚期出血的主要原因之一 ,是妊娠期的严重并发症 ,如处理不当 ,就可危及母亲和胎儿的生命。因此 ,对母儿有很大 1 placenta previa on the impact of normal pregnancy, the placenta attached to the anterior wall of the uterus, posterior wall or sidewall, if the placenta attached to the uterus part or all covered in the mouth of the cervix, then called the placenta previa . Placenta previa is one of the main causes of bleeding in the third trimester of pregnancy is a serious complication of pregnancy, such as improper handling, can endanger the lives of mothers and fetuses. Therefore, there is a great mother and child