Hemorrhage into the decidua basalis, formed retroplacental hematoma, lead to the separation of the placenta.

一)主要病理变化:底蜕膜出血，形成血肿，自附着处离。

Objective:Through our clinical observation,we want to find out a good effective method on deciduas residual of medical abortion.

目的通观察,研究药物流产后蜕膜残留的有效治疗方法。