retained placenta meaning in Chinese

胎盘滞留
胎衣不下
胎衣滞留

You should keep track of how many placentas are delivered and ensure that the number matches the number of puppies , since a retained placenta may cause problems
必须清楚有多少胎盘被排出，并且确定胎盘的数量和犬仔的数量一致。因为一个遗留在体内的胎盘可能会带来很严重的问题。
In the united kingdom , half of maternal deaths from hemorrhage are due to postpartum events ( superscript [ 1 ] ) uterine atony , degrees of retained placenta and genital tract lacerations account for most cases of postpartum hemorrhage
造成产后大出血的原因包括产道裂伤、胎盘滞留、子宫收缩无力及孕妇本身凝血功能异常。