The drug abortion generally needs to be within 49 days of pregnancy, and can be performed as an outpatient drug abortion, while the size of the gestational sac is about 1cm, try not to exceed 2cm, so as not to be too small, which will cause an invalid abortion, so as not to be too large, which may cause the drug abortion incomplete. The success rate of medical abortion will be around 60%. Go to the hospital to review the ultrasound 10 days after oral medical abortion to see if the uterine cavity is clean, so as to avoid prolonged bleeding causing infection or even anemia. If there is more residue, greater than 1cm, abortion should be considered at this time. If there are endocrine diseases, history of vascular embolism, pregnancy caused by birth control ring, ectopic pregnancy, medical abortion should not be performed to avoid the occurrence of haemorrhage.