Predicting success and reducing the risks when attempting vaginal birth after cesarean

Area of Science:

• Obstetrics and Gynecology
• Reproductive Medicine
• Maternal-Fetal Medicine

Background:

• Vaginal birth after cesarean (VBAC) attempts have variable success rates (60-80%).
• Predicting individual VBAC failure remains challenging.
• Uterine rupture risk in VBAC is 0.7-0.98%, lower with prior vaginal delivery.

Purpose of the Study:

• To review current evidence on improving VBAC safety.
• To analyze risks and success rates of labor induction in VBAC patients.
• To provide guidance on managing labor induction for women with uterine scars.

Main Methods:

• Literature review of contemporary evidence on VBAC safety.
• Analysis of success rates and complication risks associated with VBAC.
• Examination of labor induction methods and their impact on VBAC outcomes.

Main Results:

• VBAC success rates range from 60% to 80%.
• Women with a prior vaginal delivery have a lower risk of uterine rupture during VBAC.
• Labor induction in VBAC patients slightly decreases success rates but remains above 50%, with a small increase in uterine rupture risk (2-3%).

Conclusions:

• VBAC can be a safe option, particularly for women with a prior vaginal delivery.
• Labor induction in VBAC candidates is feasible using transcervical catheters, oxytocin, or amniotomy, while misoprostol is discouraged.
• Further research is needed to optimize VBAC safety and prediction methods.