The presence of large blood clots 15 days after a medication abortion is considered to be due to an incomplete medication abortion. Patients with incomplete abortion have poor uterine contractions, and poor uterine contractions can lead to increased bleeding. The presence of large blood clots indicates that the amount of bleeding is relatively large, and should be timely ultrasound, at the same time, as soon as possible to carry out sterilization surgery. The bleeding can usually be stopped by removing the remaining tissue in the uterine cavity through a hysterectomy. After the surgery, anti-infective drugs must be used, as well as drugs to promote uterine contraction. In addition, blood tests should be performed. Iron supplements are needed for patients with anemia, and blood transfusions may even be needed if blood loss is particularly high.