If the scar thickness is less than 0.1cm at 37 weeks of pregnancy, there is a risk of rupture and hospitalization for delivery is recommended. However, it is impossible to tell exactly how long it will last, and it is related to scar elasticity, size of the fetus and many other factors. If you choose to have a cesarean section for your first child, the uterus will be scarred after the cesarean section. In the later stages of pregnancy with a second child, the scar can become locally thinned due to the significant enlargement of the uterus. Generally if the scar thickness is greater than 0.2cm it is relatively safe, and if the scar thickness is less than 0.1cm it is prone to rupture. However, if the scar is more elastic and the fetus is smaller it can last a little longer commonly. However, if there are regular contractions, the contractions are more intense, rupture may occur at any time. Therefore, it is impossible to tell how long it will last, pregnant women should be hospitalized and prepared for delivery, and it is generally recommended that a cesarean section be performed within 1 week. If you choose a cesarean section for your first child, it may be difficult to have a normal delivery, and a cesarean section is generally recommended for your second child.