Bleeding from the sac in the 13th week of pregnancy may be caused by a variety of reasons, such as preeclampsia, inevitable miscarriage, rupture of ectopic pregnancy, etc. Different measures should be taken according to different etiologies. According to different causes, different measures should be taken. Common treatment measures include expectant treatment, correction of shock, evacuation of the uterus, surgical treatment and so on. 1. Expectant treatment: If the bleeding of the gestational sac in the 13th week of pregnancy is a small amount of vaginal bleeding, no pregnancy discharge, the mouth of the uterus is not open, the fetal membranes have not been broken, the size of the uterus is consistent with the gestational week, it is often suggested that the first sign of miscarriage. After sufficient rest, no sex, appropriate supplementation of progesterone or thyroxine and other treatments, if the bleeding stops, ultrasonography shows that the embryo is alive, often can continue the pregnancy. 2. Correct shock: If bleeding is heavy, and there are shock manifestations such as profuse sweating, pallor, drop in blood pressure, etc., it is necessary to actively carry out anti-shock treatment. Monitor the vital signs of pregnant women, and actively transfuse blood, supplement blood volume and coagulation factors. 3. Uterine evacuation: If the amount of intrauterine pregnancy bleeding is large, the abdominal pain is severe, and the embryonic tissue is discharged or blocked at the mouth of the uterus, then the abortion is inevitable and it is difficult to continue the pregnancy, and it is necessary to carry out uterine evacuation or curettage. 4. Surgical treatment: when the fertilized egg and the uterine cavity outside the site of the bed, followed by the rupture of the gestational sac, abortion, easy to appear bleeding. At this point, surgical treatment is usually required to remove the affected tissue, mostly requiring conservative or radical resection of the fallopian tubes. It is important to note that bleeding from the gestational sac in the 13th week of pregnancy should be treated in a timely manner in order to clarify the cause of the problem and take appropriate treatment in a timely manner.