If there is no discharge of the gestational sac, heavy bleeding, gynecological ultrasound after 2 weeks of review suggests that the uterine cavity retained a large number of cases, such as should be carried out to clear the uterus. 1. The gestational sac is not discharged: after the abortion, the gestational sac is not discharged or the ultrasound can detect most of the embryonic tissues remaining in the uterine cavity, indicating that the abortion has failed, and then it is necessary to turn to the purging operation. 2. Hemorrhage: If vaginal bleeding is significantly greater than normal menstrual flow after medical abortion, it is necessary to clear the uterus to remove the residue and at the same time to stop the bleeding. 3. Ultrasound suggests that the uterine cavity residue: 2 weeks after the abortion should be routinely to the hospital to review the ultrasound, such as ultrasound suggests that the uterine cavity residue is larger and there is a signal of blood flow, it should also be performed to clear the uterus. The best time for medication abortion is within 49 days of menopause, the success rate is only about 80%, and there are contraindications to medication abortion, first of all, it is recommended that the majority of female friends to do a good job of contraception, such as the need for abortion, it is recommended that under the guidance of the doctor to choose the appropriate abortion method for themselves.