Results:The main causes was retained placenta and membranes, endometritis and decidualitis, subinvolution of uterus, infection dehiscence and hemorrhage of caesarean incision in turn.

• 结果:主要病因依次为胎盘、蜕膜残留,子宫内膜炎和(或)蜕膜炎,子宫复旧不良以及剖宫产术后的子宫切口感染、裂开出血等。