Which of the following best describes factors that influence eligibility for TOLAC and VBAC?

• A. Based on uterine scar, previous obstetric history, current fetal status, and absence of contraindications
• B. Prior low-transverse cesarean scar, adequate pelvis, no prior classical uterine incision, and ongoing labor with appropriate monitoring
• C. Age over 40 and obesity
• D. Only the presence of prior pregnancy outcomes determines VBAC eligibility

Answer: (B)

The main idea is that eligibility for TOLAC/VBAC depends on a favorable uterine scar, supportive obstetric history, adequate pelvic anatomy, absence of contraindications, and being in a setting capable of immediate intervention if needed. A prior low-transverse cesarean scar is the most favorable since it carries the lowest risk of uterine rupture during labor. A history of a prior classical or vertical uterine incision raises rupture risk and often disqualifies VBAC. An adequate pelvis helps reduce the chance of obstructed labor and supports a safe vaginal delivery. Ongoing labor with appropriate monitoring means the birth space is prepared to detect trouble early and perform an emergency cesarean if necessary. Putting these elements together gives the most accurate description of who is eligible for TOLAC/VBAC. While factors like age or obesity can influence outcomes, they aren’t primary determinants of eligibility.