The embryo of 3 months has already had head growth, in addition, the limbs of the fetus have also developed, at this time to do abortion is more harmful to the mother, mainly in the following aspects: first of all, it may lead to the damage of the cervix, because such a large embryo has to be flowed out from inside the uterus, and the cervix, if it is not ripe, can easily lead to the laceration of the cervix. In addition, since there is more tissue, the abortion takes longer and may lead to damage to the uterus. In addition, because the fetus is relatively large, it may lead to bleeding during the operation, and after bleeding, it may lead to anemia of the patient. Since the long operation time also increases the chance of infection, so after the operation, it may lead to postoperative infection, which may easily cause pelvic inflammatory disease or adnexitis. Therefore, after abortion in the third month of pregnancy, anti-inflammatory treatment should be given routinely.