Birth & Postpartum
VBAC: Eligibility, Success Rates and Finding a Supportive Provider
Everything you need to know about VBAC eligibility per ACOG Practice Bulletin No. 184 — the 60–80% success range, real rupture-risk numbers, and how to find a provider who will actually support your TOLAC.
Clinically reviewed · June 2026
Most women with one prior low transverse cesarean incision are eligible for a vaginal birth after cesarean (VBAC). About 60–80% of attempts succeed. The main risks — including uterine rupture at roughly 0.5–0.7% — are real but uncommon, and your provider and facility matter enormously.
Vaginal birth after cesarean — VBAC — is one of the most misunderstood options in obstetrics. Rates plummeted in the early 2000s not because the evidence changed, but because hospitals grew nervous about liability. Today, the American College of Obstetricians and Gynecologists (ACOG) is unambiguous: most women with one prior low transverse cesarean should be offered a trial of labor. The question for most people is not whether VBAC is possible — it is how to find a provider and facility that will actually support one.
This guide walks through ACOG's eligibility criteria, the real success-rate and risk numbers, what raises or lowers your odds, and the specific questions to ask when vetting a provider.
This article reflects current ACOG and CDC guidance and published peer-reviewed data. It is general information, not personalized medical advice. Discuss your specific history with your OB or certified nurse-midwife before making any birth decision.
Who Is Eligible for a VBAC? ACOG's Criteria, Simply Explained
ACOG Practice Bulletin No. 184 — the governing clinical guideline on VBAC — recommends that most women with one prior low transverse (horizontal) uterine incision be offered a trial of labor after cesarean (TOLAC). The guideline also extends cautious support to women with two prior low transverse incisions, calling it "reasonable to consider" TOLAC in the absence of other contraindications.
The foundational requirement is knowing what type of incision was made in your prior cesarean. Your operative report documents this. The vast majority of planned cesareans use a low transverse incision — a horizontal cut across the lower, thinner segment of the uterus, which heals well and carries the lowest rupture risk in future labors.
Absolute contraindications to TOLAC:
- Classical incision — a vertical cut through the muscular upper uterus, carrying a 4–9% rupture risk during labor. This is a firm contraindication.
- T-shaped or inverted-T incision — carries intermediate but elevated rupture risk.
- Prior uterine rupture — regardless of incision type.
- Any condition making vaginal delivery itself contraindicated — such as complete placenta previa or cord prolapse.
Factors associated with higher VBAC success probability include: a prior vaginal delivery (especially a prior VBAC), spontaneous onset of labor without induction, a non-recurring reason for the original cesarean (e.g., breech position rather than failure to progress), maternal age under 35, BMI under 30, and gestational age under 40 weeks. None of these are absolute — they are probability adjusters.
Before your VBAC consultation, request the operative report from your prior cesarean from the delivering hospital. The incision type — low transverse, classical, or T-shaped — is documented there. Many providers assume it was low transverse; confirmation is worth the paperwork.
What Are the Real VBAC Success Rates and Rupture Risks?
ACOG cites an overall VBAC success rate of 60% to 80% across the general eligible population. A 2025 analysis of 643,029 TOLAC deliveries in U.S. natality data from 2017 to 2023 found that 73.6% resulted in successful vaginal birth and 26.4% converted to a repeat cesarean — squarely in the middle of ACOG's stated range.
Your individual probability is meaningfully shaped by modifiable and non-modifiable factors:
| Factor | Effect on Success | Notes |
|---|---|---|
| Prior vaginal delivery or prior VBAC | Strongly positive | Most powerful single predictor; pushes odds toward 85%+ |
| Spontaneous (uninduced) labor onset | Positive | Rates toward upper end of 60–80% range |
| Non-recurring reason for prior cesarean (e.g., breech) | Positive | Recurring reason (e.g., CPD) reduces odds |
| Maternal age under 35 | Mildly positive | Age over 35 modestly reduces success rate |
| BMI under 30 | Mildly positive | Obesity associated with lower VBAC success |
| Gestational age under 40 weeks | Mildly positive | Post-dates reduces success probability |
| Induction of labor | Negative | Success drops to ~60.7%; rupture risk rises to ~1.4% |
| Two prior cesareans (VBA2C) | Neutral to slightly negative | Similar success rates in selected candidates; higher rupture risk; fewer supportive facilities |
Uterine rupture: the real numbers
Uterine rupture is the most serious TOLAC-specific risk and deserves clear numbers rather than vague alarm. In women with a prior low transverse incision:
- Spontaneous labor: rupture occurs in approximately 0.47%–0.7% of TOLAC attempts.
- With oxytocin augmentation or induction: rupture risk rises to approximately 1.4%.
- Classical incision: rupture risk is 4–9% — a firm contraindication for TOLAC.
By comparison, planned elective repeat cesarean carries a rupture risk of approximately 0.03%. When rupture does occur during TOLAC, neonatal death is associated in roughly 3–6% of rupture cases. These figures come from an expert review in the American Journal of Obstetrics and Gynecology.
Because rupture can progress rapidly, ACOG requires TOLAC to occur only at facilities with 24-hour surgical capability, anesthesia available without delay, and continuous electronic fetal monitoring throughout active labor. Fetal heart rate decelerations — particularly a sudden, prolonged deceleration — are an early warning signal that warrants immediate response.
Prostaglandins (misoprostol and dinoprostone) used to ripen the cervix are associated with even higher rupture rates on a scarred uterus and are generally avoided for TOLAC induction. This is one of several reasons why spontaneous labor onset is strongly preferred in VBAC candidates.
How to Find a Provider Who Will Actually Support Your VBAC
Provider and facility attitude is, by most accounts, the single largest determinant of whether a TOLAC proceeds — more than any individual clinical factor. The national VBAC rate peaked at 28.3% in 1996, collapsed to 10.6% by 2003 as hospitals restricted TOLAC access, and has only partially recovered: 15.5 per 100 eligible births in 2024 per CDC vital statistics. The gap between medical eligibility and actual VBAC rates is a provider-and-policy story, not a clinical evidence story.
Questions to ask at your first VBAC consultation
Advocates recommend asking three concrete questions:
- What percentage of your prior-cesarean patients plan TOLAC? A very low number suggests systematic discouragement rather than individual clinical decision-making.
- Of patients who plan TOLAC in your practice, what percentage achieve a successful VBAC? A rate meaningfully below the mid-70s — in an otherwise unselected eligible population — warrants scrutiny. Ask what accounts for the gap.
- Does this hospital/birth center have 24-hour surgical and anesthesia capability? Without it, TOLAC is not safely supported regardless of what the provider says.
Watch for the "bait-and-switch"
A pattern reported by VBAC advocates is providers who express support for VBAC at the first prenatal visit but introduce new criteria, shift their tone, or switch to discouragement as the pregnancy approaches term. Common late-pregnancy pressure points include large-for-gestational-age estimates on late ultrasound, dates approaching 40 weeks, and requests for "just a little induction." None of these automatically disqualify a VBAC candidate per ACOG criteria. If your provider's stance has shifted, a second opinion before 38 weeks is reasonable and appropriate.
Community resources for finding supportive providers
The International Cesarean Awareness Network (ICAN) maintains chapter listings across the United States and is the primary community resource for identifying VBAC-supportive providers and hospitals by region. ICAN chapters often have local knowledge — specific names, facilities, and recent experiences — that a general provider search cannot replicate.
Certified nurse-midwives (CNMs) with hospital or birth center privileges sometimes offer more individualized TOLAC counseling and are willing to support low-risk VBAC candidates within appropriately equipped settings. If your OB practice does not offer true TOLAC support, exploring CNM-led care within the same hospital system is worth investigating.
The VBAC Link provides evidence-based educational resources, a podcast, and VBAC-preparation coaching for families navigating the process independently of a reluctant provider team.
A note on nutrition and preparation
The time between a prior cesarean and a planned VBAC offers a meaningful window to optimize overall health. From an integrative standpoint, omega-3 fatty acids (DHA/EPA), magnesium, folate, iron, and vitamin D are each relevant to uterine function, inflammation management, and maternal reserve. Any targeted supplementation should be guided by laboratory values and discussed with your supervising provider — these are complements to, not replacements for, prenatal obstetric care.
Frequently asked
Am I automatically eligible for a VBAC?
Not automatically — eligibility depends on the type of uterine incision from your prior cesarean and whether any contraindications apply. ACOG Practice Bulletin No. 184 states that most women with one prior low transverse (horizontal) uterine incision should be offered a trial of labor after cesarean (TOLAC). A classical or vertical incision, prior uterine rupture, or T-shaped incision are firm contraindications. Complete placenta previa and other conditions that rule out vaginal birth altogether also disqualify you. The best first step is to obtain and review your operative report from your previous cesarean — your incision type is documented there — and bring it to your VBAC consultation. This is general information, not medical advice. Always discuss eligibility with your OB or certified nurse-midwife.
What is the overall VBAC success rate?
ACOG cites a VBAC success rate of 60% to 80% across the general eligible population. A 2025 analysis of 643,029 U.S. TOLAC deliveries from 2017–2023 found that 73.6% resulted in successful vaginal birth. Your individual odds are shaped by specific factors: a prior vaginal delivery (especially a prior VBAC) and spontaneous labor each push your probability toward the higher end. Induction reduces success to around 60–61% while also elevating uterine rupture risk. Maternal age under 35, BMI under 30, and a non-recurring reason for the original cesarean (such as breech presentation rather than failure to progress) are all associated with better outcomes. A VBAC calculator based on ACOG-validated predictors can provide a personalized estimate, though it should supplement, not replace, a direct conversation with your provider.
How common is uterine rupture during a VBAC attempt?
Uterine rupture is the most serious VBAC-specific risk, but it is uncommon. In women with a prior low transverse incision, rupture during TOLAC occurs in approximately 0.47%–0.7% with spontaneous labor, rising to roughly 1.4% when oxytocin augmentation or induction is used, according to a review in the American Journal of Obstetrics and Gynecology. For context, planned elective repeat cesarean carries a rupture risk of approximately 0.03%. When rupture does occur, neonatal death is a risk in roughly 3–6% of rupture cases — serious enough that ACOG requires TOLAC to occur only at facilities with 24-hour surgical capability, continuous fetal monitoring, and immediate-access anesthesia. Women with classical incisions face a much higher rupture risk of 4–9% and should not attempt TOLAC.
Can I have a VBAC after two previous cesareans?
Possibly. ACOG Practice Bulletin No. 184 states that it is "reasonable to consider" TOLAC for women with two prior low transverse incisions when no other contraindications exist. Studies show that success rates for VBAC after two cesareans (VBA2C) are similar to single-prior-cesarean TOLAC in appropriately selected candidates. However, uterine rupture risk is somewhat higher than for a first TOLAC, and fewer facilities are willing to support a VBA2C attempt. Finding a provider and hospital explicitly experienced with VBA2C is essential. The International Cesarean Awareness Network (ICAN) maintains regional chapter listings that can help you identify VBA2C-supportive providers near you. Thorough counseling and careful patient selection are non-negotiable in this scenario.
What does a 'VBAC-supportive provider' actually look like?
A genuinely supportive provider is transparent about their practice data. The VBAC Link recommends asking: what percentage of your prior-cesarean patients plan TOLAC, and of those, what percentage achieve VBAC? A success rate meaningfully below the mid-70% range in an otherwise eligible population warrants follow-up questions. Warning signs include providers who verbally endorse VBAC early in pregnancy but introduce new criteria or shift toward discouragement near term — a pattern sometimes called "bait-and-switch." Also verify the delivery facility: hospitals must have 24-hour surgical capability and continuous fetal monitoring available for TOLAC — some smaller or rural facilities have policies that exclude TOLAC entirely. Certified nurse-midwives with hospital or birth center privileges sometimes offer more individualized TOLAC counseling and are worth exploring as part of your care team.
Does induction make VBAC less likely to succeed?
Yes — induction reduces VBAC success rates and raises rupture risk. Women who go into labor spontaneously achieve VBAC at rates toward the upper end of the 60–80% range; those who are induced see success rates around 60.7%, with uterine rupture risk rising to approximately 1.4% compared to 0.47–0.7% for spontaneous labor. This is documented in both ACOG guidance and a PubMed Central study on oxytocin use during TOLAC. Prostaglandins (misoprostol, dinoprostone) carry an additional heightened rupture risk on a scarred uterus and are generally avoided for TOLAC. If induction becomes medically necessary, the decision should involve careful risk-benefit discussion with your provider — the tradeoffs are real and must be weighed against the reason for induction.
How has the national VBAC rate changed over time?
The national VBAC rate has had a dramatic arc. It peaked at 28.3% of eligible births in 1996, then fell sharply to a nadir of 10.6% in 2003 — driven largely by liability concerns and facility policies that restricted TOLAC availability. Since then, rates have modestly recovered: 12.4% in 2016, 13.3% in 2018, 13.9% in 2020, and 15.5 per 100 eligible births in 2024 per CDC vital statistics. Despite this partial recovery, the VBAC rate remains far below what ACOG's clinical guidance would support given that most prior-cesarean patients are eligible candidates. The gap between medical eligibility and actual VBAC rates reflects ongoing provider reluctance and hospital policy barriers — not an evidence-based reason to avoid TOLAC in appropriate candidates.