Rupture of the uterus is very rare, especially for women who’ve not had a previous rupture, cesarean delivery, or other uterine surgery. It occurs with about 0.3% in women who have had a prior C-section. When a rupture occurs, it’s often along the scar line from a C-section. A cesarean section increases uterine rupture risks, and that’s why it’s considered high risk for a woman to attempt a vaginal birth after delivery or VBAC. This complication happens most often during labor; however, it can occur earlier in pregnancy.