Ultrasound review is required between 10-15 days after the abortion to observe the recovery of the uterus and whether there are residues in the uterine cavity. If the ultrasound shows that the uterus is recovering well and there is no residue in the uterine cavity, the patient does not need to be re-examined if she is able to have a normal menstruation. If the patient has abnormalities such as heavy vaginal bleeding or abdominal pain after a medical abortion, a timely review is needed without a fixed time. The main review includes ultrasound and routine gynecological internal examination to observe whether the patient has abnormal bleeding or abdominal pain that may be caused by residual uterine cavity, pelvic inflammatory disease, poor uterine regeneration, etc. If the patient’s review after 15 days of medical abortion shows a small amount of residue in the uterine cavity, but there is no need for clearance surgery, and the patient has no vaginal bleeding, the patient needs to review the ultrasound after a menstrual period to observe whether the residue is expelled from the body with menstruation.