长期以来,做为计划生育重要措施的人工流产被广大妇女选做避孕失败的首要补救方式。人工流产主要通过负压吸引将胎儿及胎盘从子宫中“吸”出来。此种方法虽可靠,但作为一种手术让许多妇女望而生畏,况且人工流产由于操作者技术上的缺陷和人为疏忽也有可能造成子宫穿孔大出血。人们希望能有一种简单有效的流产方式。近年来药物流产以其简单、方便、痛苦小的优点得到了广泛的应用。使用药物流产的妇女人数大大增加,但这其中有些人却并非在医生的指导与观察下用药, For a long time, abortion as an important measure of family planning has been chosen by the majority of women as the primary remedy for the failure of contraception. Induced abortion primarily “pulls” the fetus and placenta from the uterus through negative pressure. Although this method is reliable, but as a surgical dilemma for many women Moreover, abortion due to the operator’s technical shortcomings and human negligence may also cause perforation bleeding uterus. People want a simple and effective method of abortion. In recent years, medical abortion has been widely used for its advantages of simplicity, convenience and little pain. The number of women using medical abortion has greatly increased, but some of these people have not been treated under the guidance and observation of doctors.