The 3rd cesarean delivery usually requires an interval of more than 2 years, and it is usually recommended to have another pregnancy about 2-5 years after the 2nd cesarean delivery. Under normal circumstances, a 3rd cesarean section is usually not recommended. If a 3rd cesarean section is needed for special reasons, it is recommended to interval more than 2 years after the 2nd cesarean section before pregnancy. It takes about 2 years for the elasticity of the lower part of the uterus to be gradually restored after the cesarean section when the elastic fibers of the lower part of the uterus proliferate and the scar is formed. In addition, the elasticity of the uterine scar is generally best in about 2-5 years, so it is recommended to have another pregnancy after cesarean section in this period. If the interval is too long, the elasticity of the scar may not be good, and if the interval is too short, it is also easy for the scar to rupture during pregnancy and delivery because the uterine scar has not fully grown. In addition, if a pregnant woman with a scarred uterus becomes pregnant again, it is recommended to have a good maternity checkup and to consult the obstetrician as soon as discomfort is detected during pregnancy.