If the reason for the first cesarean section no longer exists and there is no new indication for cesarean section, the second child can be delivered by normal delivery, but the risk is increased compared to the first child, mainly the risk of uterine rupture during delivery, the probability is about 1%. With the liberalization of the second child policy, more and more women will have a second child, and more and more women who have had a cesarean section with their first child, i.e., women with scarred uterus, will have a second pregnancy, so the possibility of a normal birth with the second child needs to be fully evaluated by an experienced physician. First of all, she has the desire to deliver vaginally, the delivery hospital has the emergency resuscitation capacity to deal with emergencies that occur during delivery, and there are no incisions other than cesarean section in the previous surgery. In addition, there are factors such as the appropriate time interval and the right size of the baby. For women who have had a cesarean section with their first child, it is important to go to the hospital in advance for consultation, including the time interval since the last delivery and the pre-pregnancy body mass index, all of which need to be within a certain range in order to facilitate the possibility of vaginal delivery in this pregnancy. Also, close obstetrical examinations must be performed for another pregnancy because there is a risk of scar pregnancy, uterine rupture, placental implantation, etc. And the second pregnancy must be more than 18 months apart, but note that the length of time between pregnancies is not directly proportional to whether uterine rupture must occur. Therefore, the first child is delivered by cesarean section, and the second child is also possible to be delivered by normal delivery.