Generally, a cesarean section is required for second births with a scar thickness of less than 3 millimeters, as the scar is unable to withstand the pressure generated by uterine contractions. When it is less than 3mm, the scar can hardly withstand the pressure generated by uterine contraction, which may cause uterine rupture, and there is also the risk of placenta adherence and implantation leading to hemorrhage, which may endanger the mother’s life and possibly suffocate the fetus. If a woman has a keloid uterine pregnancy, she should undergo labor checkups on time during pregnancy, and control her weight during pregnancy to avoid the occurrence of a giant baby, so as to avoid uterine rupture. Pregnant women should choose their mode of delivery carefully on the advice of their doctor and be monitored closely during labor to prevent risks such as uterine rupture.