The best drug abortion is within 49 days of menopause, more than 49 days can not be drug abortion, drug abortion needs to be carried out under the guidance of a professional physician. Drug abortion is a common clinical method of non-surgical termination of pregnancy, usually the first oral mifepristone, antagonism of progesterone function, so that the gestational sac to lose the support of progesterone, to play the role of embryo killing, and thereafter oral Misoprostol tablets, to promote the uterus contraction, soften the cervix, so that the pregnancy out of the uterine cavity, to achieve the purpose of termination of pregnancy. The pregnancy sac within 49 days of menopause is generally smaller, at this time to perform medication abortion bleeding and other risks are lower, the success rate of abortion is high, so medication abortion within 49 days of menopause is the best. It should be noted that before the medication abortion, ultrasound examination is needed to confirm the position of the gestational sac, such as not seeing the gestational sac, ectopic pregnancy, scarred pregnancy, etc. prohibit the medication abortion; in addition to the pregnancy with a device, history of blood disease, allergies and other groups of people who have a high risk of medication abortion, should not be performed medication abortion.