After spontaneous abortion, you need to review the ultrasound to understand the situation of the uterine cavity, according to the size of the uterine cavity residue to assess the need for removal of the uterus, the uterine cavity has no residue without removal of the uterus does not have any effect, but there is residue without removal of the uterus will cause infection and inflammation. 1. If the ultrasound suggests that there is no uterine residue or the uterine residue is very small, it will have little effect on the uterus if it is not cleared, and you should follow the doctor’s instructions and choose medication. However, it is necessary to pay attention to the recovery of menstruation, and review the ultrasound again half a month after the abortion. If vaginal bleeding, secondary infection, etc. occurs during the drug treatment, it is necessary to change to the purging operation. 2. If the patient’s residue in the uterine cavity after spontaneous abortion > 20mm, or even abdominal pain is more serious, more vaginal bleeding, bleeding for a long time, not to do the surgical treatment of purging the uterus will have intrauterine infections, which may lead to inflammation of the reproductive tract, so it is recommended that the patient at this time must be timely removal of residue in the uterus, and at the same time, to do a good job of postoperative recuperation. It is recommended that patients go to the hospital as soon as possible after spontaneous abortion, and choose a suitable program for themselves according to the doctor’s guidance.