The risk of women having three cesarean deliveries is relatively high and is prone to uterine rupture, fatal placenta praevia and preterm delivery for several reasons: first, because the uterine incision chosen during the cesarean delivery is in the lower uterine segment, which has a thin muscle layer and is only about 0.6-1 cm in length before pregnancy and gradually stretches to 8-10 cm in the later stages of pregnancy. This scarred lower uterine segment, because of its inability to expand in time and poor elasticity, can easily lead to rupture of the pre-eclampsia or rupture of the uterus. Secondly, women who have had multiple cesarean sections may also have a placenta that was planted in the uterine scar during pregnancy and formed a fatal placenta praevia, which is life-threatening to both the pregnant woman and the fetus. Third, women who have had multiple cesarean sections and have a small range of motion in the uterine cavity can easily lead to preterm labor and intrauterine growth retardation.