VBAC After Two C-Sections and a Vaginal Birth: Eligibility and Counseling

A history of two prior cesareans followed by a vaginal birth (VBAC) is a unique scenario. Current ACOG guidelines address VBAC after two prior C-sections (VBAC-2) but data on subsequent vaginal delivery after VBAC is limited.

Key Considerations

• Uterine scar integrity: Two hysterotomy scars increase rupture risk (~1.5–2% for VBAC-2 vs. 0.5–0.9% for VBAC-1). Prior successful VBAC is reassuring but does not eliminate risk.
• Incision type: Both prior must be low-transverse. Any classical/vertical = contraindication.
• Interdelivery intervals: ≥18 months between last C-section and this pregnancy preferred.
• Current pregnancy factors: Singleton, vertex, no placenta previa/accreta.
• Facility: Must support trial of labor after cesarean (TOLAC) with immediate cesarean capability.

Counseling Points

• Review operative notes for uterine closure technique (single vs. double layer).
• Discuss rupture risk vs. repeat C-section risks (accreta, adhesion, longer recovery).
• Success rates for VBAC-2: ~60–70% in selected candidates.
• Document shared decision-making; obtain informed consent for TOLAC.

Alternative

Elective repeat C-section at 39 weeks is reasonable if TOLAC not desired or contraindicated.

Individualized counseling with a provider experienced in VBAC-2 is essential.