The best time to abort a pregnancy should be less than 49 days, when the gestational sac is relatively small, if the B ultrasound is normal intrauterine pregnancy, belongs to the indications for drug abortion, can be under the guidance of the doctor sequential use of mifepristone tablets and misoprostol tablets, which can play the role of drug abortion, the impact on the human body is relatively small, and will not cause the endometrial thinning because of abortion. If the pregnancy is greater than 49 days and less than 3 months, you can consider having a visual painless abortion because the operation is more delicate and will not damage the endometrium or can minimize the damage to the endometrium and the recovery is faster after the operation. If the pregnancy is older than 3 months, you need to consider induction of labor.