# 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.

*Published 2026-06-25 · By Priya Nair, MD*

The short answer
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](https://vbacfacts.com/wp-content/uploads/2024/11/ACOG-PB184-VBAC-2017.pdf) — 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.

Getting your operative report matters
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:

  Key factors and their effect on VBAC success probability

      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](https://www.ajog.org/article/S0002-9378(22)00840-7/fulltext).

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](https://www.cdc.gov/nchs/data/vsrr/vsrr043.pdf). 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.

## Sources

1. [ACOG Practice Bulletin No. 184 — Vaginal Birth After Cesarean Delivery](https://vbacfacts.com/wp-content/uploads/2024/11/ACOG-PB184-VBAC-2017.pdf)
2. [Vaginal Birth After Cesarean Delivery — StatPearls](https://www.ncbi.nlm.nih.gov/books/NBK507844/)
3. [The Truth about the VBAC Success Rate](https://www.thevbaclink.com/vbac-success-rate/)
4. [Trial of labor after cesarean, vaginal birth after cesarean, and the risk of uterine rupture: an expert review](https://www.ajog.org/article/S0002-9378(22)00840-7/fulltext)
5. [Predicting VBAC Outcomes from U.S. Natality Data using Deep and Classical Machine Learning Models](https://arxiv.org/pdf/2507.21330)
6. [Oxytocin use in trial of labor after cesarean and its relationship with risk of uterine rupture](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7786988/)
7. [CDC Vital Statistics Rapid Release Report No. 43 (April 2026)](https://www.cdc.gov/nchs/data/vsrr/vsrr043.pdf)
8. [Debunking Common Myths About VBAC](https://tampabaymidwifery.com/debunking-common-myths-about-vbac/)

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Source: https://natalnew.com/birth/vbac-eligibility-success-rates
Index: https://natalnew.com/llms.txt · Full text: https://natalnew.com/llms-full.txt