Painless abortion after pregnancy is generally available from 6 weeks to 10 weeks after menopause. First of all, it must be determined that the pregnancy is intrauterine, which is the first condition for abortion. The latest can not be more than 10 weeks after menopause, generally speaking, within 6 weeks – 10 weeks after menopause for abortion surgery is more appropriate, too small easy to miss suction, too large to form fetal bone tissue, and then carry out abortion surgery, easy to abortion is not clean as well as more bleeding and so on. Need to pay attention to avoid sexual intercourse within 1 week before the operation. The night before the painless abortion, pregnant women need to take a bath and change clean underwear. Fasting and water fasting should be done for about 6 hours before the operation, and it should be noted that abortion cannot be done when there are symptoms of cold or fever.