After the medication abortion, you can judge whether the abortion is clean by ultrasound examination, patient’s symptoms, patient’s signs, and the amount of vaginal bleeding. 1. Ultrasonography: Patients undergoing medication abortion must undergo ultrasonography to determine whether there is any residual embryonic tissue in the uterine cavity and to rule out the possibility of incomplete abortion. 2. Patient symptoms: after the drug abortion, if the patient does not have nausea, abdominal pain and other symptoms, usually indicates that the drug abortion is relatively clean. 3. Patient signs: if the patient after the drug abortion, when checking the uterus without pressure pain, there is no fever and other symptoms of infection, it means that the possibility of intrauterine tissue residue is small. 4. The amount of vaginal bleeding: after the drug abortion, if there is a small amount of vaginal bleeding, it is a normal phenomenon. But if the vaginal bleeding stops and then there is a lot of bleeding, then the abortion may fail and there is still embryonic tissue left in the uterine cavity. If the patient has nausea, abdominal pain and vaginal bleeding after the medication abortion, it is necessary to consider whether the tissue in the uterine cavity is completely discharged, and it is recommended to go to the hospital for ultrasound examination in time.