The sequelae of cesarean delivery mainly include scarred uterus, abdominal scar, anesthesia sequelae, endometriosis, pelvic adhesions, etc. The more the number of cesarean deliveries, the more likely the sequelae will appear. 1. Scarred uterus: Because cesarean delivery requires cutting open the abdominal wall and uterus to remove the fetus, a scar will be produced on the uterine wall after the operation, which is not easy to recover and will bring great risk to the second pregnancy. If the placenta of a second pregnancy grows on the scar, it will increase the chance of hemorrhage between conception and delivery, putting the life of the mother and fetus at risk. If a diverticulum forms after a cesarean section, the woman may experience vaginal bleeding and prolonged periods, which require prompt treatment. This will be another consumption for the body of the mother who has not recovered well; 2. abdominal scar: cesarean section will leave a scar on the abdomen of the mother, which is not only unattractive, but also may cause discomfort if the mother has a sensitive body when the weather changes suddenly; 3. after-effects of anesthesia: most of the anesthesia for cesarean section adopts intra-vertebral anesthesia, which may cause after-effects of spinal pain after the operation. Endometriosis: If the operation is not strict, endometrial cells may be planted in the abdominal wall incision, causing endometriosis in the abdominal wall, which may be manifested as pain during menstruation and hard nodes in the wound. The pelvic adhesions will not only bring trouble to the re-operation, but also may make the patient will have abdominal discomfort, intestinal obstruction and other conditions after the operation.