植入性胎盘是因为绒毛上皮直接生长而侵入子宫肌层内肌纤维束之间的一种明显的病理改变。在子宫内腔缺乏或部分缺少蜕膜组织,这一层在怀孕时是非常主要的。有了蜕膜层,产后胎盘可以自然剥离,缺乏这层,胎盘便不能剥离。因胎盘与子宫肌层之间无明显界限, Implantable placenta is a clear pathological change between muscle fiber bundles in the myometrium due to the direct growth of villus epithelium. In the uterine cavity, the lack or partial lack of decidual tissue, this layer is very important in pregnancy. With decidual layer, postpartum placenta can naturally peel, the lack of this layer, the placenta can not be stripped. Due to the placenta and myometrium between no obvious boundaries,