Results The causes were rupture of cesarean incision, subinvolution of uterus, retained placenta or deciduas, endometritis, serious anemia, and postpartum choriocarcinoma in order.

• 结果发病原因依次为子宫切口裂开，子宫复旧不良，胎盘、蜕膜残留，子宫内膜炎，重度贫血，产后绒癌。