The gestational sac is 13mm from the last cesarean section incision and the choice of continuation or termination of pregnancy should be made on a case-by-case basis. 1. Continuation of pregnancy: As the pregnancy grows, the position of the gestational sac can continue to grow upwards and the position can become normal. However, bed rest is required and the position of the gestational sac should be checked regularly to avoid miscarriage. 2. Termination of pregnancy: due to the history of previous cesarean section, the low position of the gestational sac may cause keloidal pregnancy, miscarriage, uterine rupture, dangerous placenta praevia, and in severe cases, hemorrhagic shock due to massive vaginal bleeding. If the ultrasound in the second trimester of pregnancy suggests keloidal pregnancy, it is necessary to give targeted treatment under the guidance of the doctor. It is recommended that women during pregnancy should attend obstetric checkups on a regular basis, and should pay attention to reviewing the position of the gestational sac if it is found to be too low, and should be treated promptly if there is a risk of miscarriage or uterine rupture.