用药物终止早孕的方法简称为“药流”。“药流”通常是用米非司酮与小剂量的前列腺素合用,有效率可达90～95％。米非司酮是通过阻断孕激素发挥作用,影响胚胎着床、孕印发育,从而达到人工流产的目的。前列腺素可以促进子宫收缩,加强人工流产的效果。然而,并非任何妇女均可使用“药流”,其效果也并非人人如愿。凡有 The method of termination of early pregnancy with drugs is referred to as “drug flow.” “Drug flow” is usually combined with a small dose of mifepristone prostaglandin, the efficiency of up to 90 to 95%. Mifepristone is through blocking the role of progesterone, affecting embryo implantation, pregnancy development, so as to achieve the purpose of induced abortion. Prostaglandins can promote uterine contractions and enhance the effect of induced abortion. However, not all women can use “medical abortion” and the effect is not for everyone. Where there is