通常,停经42天以内的妊娠称为早早孕,药物流产是指用药物抗早早孕,又称催经止孕,即有孕流产、无孕催经。由于药物流产不必手术,痛苦较少,女性在避孕失败后多会选择这种流产方法。目前临床使用的药物是国产的米非司酮,属于孕酮的拮抗剂,与前列腺素联合应用,可提高流产的成功率,达到90%左右。 Usually, menopause within 42 days of pregnancy known as early pregnancy, medical abortion refers to the use of drug anti-early pregnancy, also known as reminder by the only pregnancy, that is, pregnant abortion, no pregnancy reminders. Because of medical abortion without surgery, less painful, women will choose this abortion method after the failure of contraception. The current clinical use of drugs is made of mifepristone, is a progesterone antagonist, combined with prostaglandin, can increase the success rate of miscarriage, reaching about 90%.