After the abortion is not clean, the disposal method is mainly based on the ultrasound to see the size of the residue. If the residue is very small, you can take some oral medicines, such as IUD or IOM to promote the discharge of the residue. If the residue is large, and cause abdominal pain, vaginal bleeding, this time to clear the uterus. If the uterus is not cleared, it may cause a lot of bleeding or cause infection, or even cause pelvic inflammatory disease. After abortion, if the residue is not much, try not to clear the uterus, because the second clearance may cause further damage to the uterine lining. If the removal is excessive, the damage to the base of the endometrium may cause adhesions in the uterine cavity, low menstrual flow after the operation, thin endometrium, and may even cause difficulties in embryo implantation in the future, resulting in infertility.