It is possible to abort a fetus in the fourth month of pregnancy, but because of the large size of the month, it is necessary to first be hospitalized for induction of labor. Also, because the sex of the fetus can already be determined in the fourth month of pregnancy, you must have a certificate of induced abortion issued by Family Planning before you can be hospitalized for abortion to prevent illegal abortion due to gender identification. In addition, blood cell analysis, coagulation analysis, liver function, kidney function, virus eight, blood type, electrocardiogram and obstetric ultrasound should be performed before abortion, and the results of these tests are not abnormal and contraindications to abortion are excluded. The commonly used abortion method, oral mifepristone, combined with intra-amniotic injection of estradiol to induce abortion, is usually followed by expulsion of the embryo 24-48 hours after the injection of estradiol. During this process, if heavy vaginal bleeding occurs, a timely curettage is performed to terminate the pregnancy.