Many birthing people considering a VBAC (Vaginal Birth After Cesarean) want solid facts to guide their decisions. VBAC is defined as a planned attempt at a vaginal birth after one or more prior cesarean deliveries (a TOLAC — Trial of Labor After Cesarean) and is supported by major professional guidelines when individualized risk assessment and shared decision-making occur.
VBAC Success Rates — What Research Shows
VBAC success generally falls in the 60–80% range for those attempting TOLAC, meaning roughly 3-4 out of 5 people who labor after cesarean deliver vaginally.
Success rates are higher when:
A prior vaginal birth occurred before or after the cesarean
Labor begins spontaneously (vs being induced)
There is strong support during labor — such as a doula or continuous care
This aligns with data showing TOLAC offers a real chance at a vaginal birth when clinical criteria are met.
Uterine Rupture — Risk and Context
Uterine rupture is the most serious complication of VBAC but remains rare. Research estimates the risk of complete uterine rupture during VBAC at about 0.5% (or roughly 1 in 200) in well-resourced settings.
For comparison, spontaneous rupture occurs in approximately 1 in 280 labors after cesarean. Although the consequence can be significant, most people with scarred uteri do not experience rupture — and in facilities prepared for emergencies, outcomes are generally positive.
Benefits of VBAC vs Repeat Cesarean
According to clinical guidance, VBAC is associated with:
Lower maternal morbidity (e.g., fewer infections, less blood loss)
Reduced risk in future pregnancies, including lower chances of abnormal placentation
Shorter hospital stays and faster recovery
Repeat cesareans are important and life-saving in many cases, but cumulatively carry their own long-term risks — including placenta accreta, adhesions, and surgical complications with each additional surgery.
Key Principles from Evidence
VBAC is a mainstream, evidence-based option supported by ACOG and other international guidelines for most people with a low-transverse incision.
Shared decision-making — not rigid rules — is essential to balancing risks and benefits.
Most people who attempt VBAC safely achieve it, particularly with supportive, individualized care.
So what now?
Understanding VBAC through the lens of evidence empowers you to make informed, personalized choices. While all birth options carry some risk, VBAC is a well-studied and generally safe path when planned with appropriate candidacy, care, and communication.