The gestational sac is the initial form of the embryo. If the position of the gestational sac is low, it may be caused by low fertilized egg implantation, scar pregnancy, placenta praevia, etc., which should be handled according to the specific situation. 1.Low fertilized egg implantation position: the fertilized egg implantation position is low, so the position of the gestational sac is also low. You need to take proper rest, adjust your diet reasonably, keep your bowels loose, and prohibit intercourse to avoid miscarriage. If miscarriage does not occur, around 16 weeks of pregnancy, the lower part of the uterus will be formed and the position of the placenta will gradually extend towards the bottom of the uterus, which can improve the situation of low gestational sac. If symptoms of miscarriage such as lower abdominal pain, lumbar acidity and vaginal bleeding occur, you should go to the hospital in time. 2. Scar pregnancy: If you have a history of cesarean delivery and the position of the gestational sac is low, it may be a scar pregnancy, and this kind of pregnancy is likely to have hemorrhage. Therefore, it must be treated in a hospital with conditions, either surgically or conservatively with medication; 3. Placenta praevia: if the placenta is positioned below the fetal previa and attached to the lower segment of the uterus and the lower edge reaches or covers the inner cervical opening through ultrasound examination after 7 months of pregnancy, placenta praevia can be diagnosed, which often leads to painless and heavy bleeding in late pregnancy and should be taken seriously. Cesarean delivery is usually recommended. In addition, if there are polyps in the uterine cavity or an intrauterine device, this can affect the positioning and implantation of the fertilized egg, leading to a downward shift in the position of the fertilized egg, resulting in a low position of the gestational sac in the later stages of pregnancy. The low position of the gestational sac can easily lead to spontaneous abortion, so it is usually not possible to continue the pregnancy.