Which previous cesarean incision would be a contraindication for attempting a VBAC?

• A. Low transverse incision
• B. Vertical incision
• C. T-shaped incision
• D. Classic incision

Answer: (D)

The main idea is that whether you can attempt a VBAC depends on the location and type of uterine scar from a previous cesarean. Scars in the lower uterine segment from a low transverse incision are associated with a relatively lower risk of rupture during labor and are generally compatible with VBAC in carefully selected cases. Scars that involve the upper uterine segment, especially vertical/ Classic incisions, create a scar under the highest stress during contractions and carry a much higher risk of uterine rupture, making VBAC not advisable. A classic incision, which is a vertical cut through the upper uterus, is the archetypal contraindication to attempting a VBAC. So, among the options, this type of incision best indicates that VBAC should not be attempted. The low transverse incision is the one that does not contraindicate VBAC.