After the birth of two children to do medical abortion is possible, but to do medical abortion must choose the time of medical abortion, usually between 35-49 days of pregnancy to do ultrasound to see the uterine cavity with a pregnancy bag, if the pregnancy bag is more than 0.8cm, you can use medication to abort, if the pregnancy bag is too small, it may be insensitive to the drug, it is easy to have an incomplete abortion. If more than 2.5cm is the gestational sac is too large, the rate of incomplete abortion with medication is also relatively high. Incomplete abortion is easy to occur with medication, and the rate of incomplete abortion can reach about 10%. In the final application of three tablets of Misoprostol, it is best to go to the hospital under the observation of the doctor to use the drug, because some people after taking these three tablets will have hemorrhage. It is safer to take them in the hospital if heavy bleeding occurs and immediate evacuation is needed to stop the bleeding.