If you have had a cesarean and you are dreaming about a different birth experience next time, one question tends to sit at the front of your mind: am I even allowed to try? The idea of a vaginal birth after cesarean, or VBAC, can feel like something reserved for other people, the ones with "perfect" pregnancies and uncomplicated histories. The reassuring truth is that far more people qualify for a trial of labor after cesarean, known as TOLAC, than most first assume. Candidacy is not a single yes-or-no stamp. It is a thoughtful conversation built on your specific history, your health today, and your goals for this birth.

This guide walks through who is generally considered a good candidate, what raises and lowers the odds of success, and the rare situations where a repeat cesarean truly is the safest path. Throughout, remember that this is educational information, not a substitute for a personalized assessment with a provider who has read your actual operative records.

The Foundation: What Kind of Uterine Scar Do You Have?

The single most important factor in VBAC candidacy is not your age, your weight, or the size of your baby. It is the type of incision made in your uterus during your prior cesarean. This is different from the scar you see on your skin. A person can have a horizontal "bikini" skin incision and still have a different incision on the uterus underneath, which is why your surgical records matter so much.

Most modern cesareans use a low-transverse uterine incision, a side-to-side cut in the lower, thinner portion of the uterus. This scar heals well and holds up strongly in a future labor. According to the American College of Obstetricians and Gynecologists (ACOG), most people with one prior low-transverse cesarean should be counseled about and offered a trial of labor. In other words, being offered TOLAC is meant to be the norm for this group, not a special exception.

Single Prior Low-Transverse Incision: A Good Candidate

If you have had one previous cesarean with a low-transverse incision, and no other complicating factors, you are considered a strong candidate. For an optimal candidate in this category, the predicted chance of a successful vaginal birth is greater than 60 percent, and often considerably higher. The risk of uterine rupture, the complication most people worry about, sits in the range of roughly 0.5 to 0.9 percent. That is a small number, and it is one reason midwives and physicians feel comfortable supporting TOLAC in a hospital setting where a rapid response is available if needed.

Two Prior Low-Transverse Cesareans: Still Reasonable

Many people are surprised to learn that having two prior cesareans does not automatically close the door. ACOG states that TOLAC is reasonable for people with two previous low-transverse cesarean deliveries. Success rates remain encouraging, particularly when other favorable factors are present, such as a prior vaginal birth. This is a situation where individualized counseling truly shines, because the details of your history carry real weight.

Did You Know? A caesarean section delivers a baby through an incision in the abdomen and uterus. The type of uterine incision, most often a low-transverse cut, is one of the biggest factors in whether a future vaginal birth is considered safe.

Factors That Improve Your Odds of Success

Candidacy is about safety, but many people also want to know their realistic chance of success. Researchers with the NICHD Maternal-Fetal Medicine Units Network developed a prediction model that highlights several factors linked to a higher likelihood of a successful VBAC:

  • A prior vaginal birth. Having delivered vaginally at any point, whether before or after your cesarean, is a strong positive signal.
  • A prior successful VBAC. This is one of the most powerful predictors. Success rates climb sharply with each successful VBAC. Someone with no prior VBAC might have around a 73 percent predicted success rate, while someone with one or more prior VBACs can see predicted success rates above 90 percent.
  • Spontaneous labor. Going into labor on your own, rather than being induced, is associated with better outcomes.
  • A non-recurring reason for the prior cesarean. If your first cesarean happened because your baby was breech, that reason is unlikely to repeat itself in the same way. Breech position is a classic example of a one-time indication rather than an ongoing obstacle.
  • Lower BMI and younger maternal age. These are statistical trends, not gatekeepers, and they nudge the odds in a favorable direction.

One expectant mother in the Conejo Valley shared that she had assumed her first cesarean, done for a footling breech baby, meant she was destined for another surgery. When a midwife explained that breech is a textbook non-recurring indication, her whole outlook shifted. Her body had never been given the chance to labor, and that context changed the conversation entirely.

Factors That Can Lower the Odds

Just as some factors help, others can reduce the predicted chance of a vaginal delivery. It is important to frame these honestly: lower odds do not mean disqualification. They mean the counseling conversation deserves more nuance. Factors associated with reduced success include:

  • A recurrent indication. If your prior cesarean was for something like labor that stalled after full dilation, that pattern has some chance of recurring, though it certainly does not guarantee it will.
  • Higher BMI.
  • Advanced maternal age.
  • An estimated large baby. Suspected fetal size alone is an imprecise measurement and is not a reason to rule out TOLAC, but it is part of the overall picture.
  • Induction of labor. Induction can still be done thoughtfully in a TOLAC, but spontaneous labor tends to carry better odds.

The right response to these factors is not fear. It is information. A person with a couple of these factors may still choose TOLAC with full confidence after understanding what they mean.

Absolute Contraindications: When Repeat Cesarean Is Safest

There are a small number of situations where a trial of labor is not recommended because the risk of uterine rupture or another serious complication is genuinely elevated. These are the true contraindications:

  • A prior classical, T-shaped, or J-shaped (high-vertical) uterine incision. Unlike the low-transverse scar, these incisions extend into the thicker, more active upper portion of the uterus and carry a rupture risk of roughly 4 to 9 percent, far higher than a low-transverse scar.
  • A prior uterine rupture. A history of rupture raises the risk of it happening again.
  • Prior extensive transfundal uterine surgery, such as certain fibroid removals that entered the uterine cavity.
  • Placenta previa, where the placenta covers the cervix, which requires a cesarean regardless of scar history.
  • Any other condition that independently requires a cesarean delivery.

If any of these apply to you, a planned repeat cesarean is the safer, recommended choice, and that is worth honoring rather than mourning. The goal is always a healthy parent and a healthy baby.

The Timing Factor: Interpregnancy Interval

One detail that often gets overlooked is spacing between births. Allowing your uterus adequate time to heal appears to matter. A shorter interval between a cesarean and the next delivery is associated with a somewhat higher rupture risk. Many providers point to an interpregnancy interval of around 18 months as a helpful target for reducing that risk. If your pregnancies are spaced more closely, it does not automatically remove you from consideration, but it is one more piece your provider will weigh.

Why Individualized Counseling Matters So Much

Here is the theme running through everything above: no online article, and no single risk factor, can determine your candidacy on its own. Two people can look identical on paper and arrive at different, equally valid decisions once their full stories, values, and records are reviewed.

We have heard from more than one hopeful parent who was told flatly by one provider that they were "not a candidate," only to seek a second opinion and discover they had been a reasonable candidate all along. One local mom carrying her third baby had two prior low-transverse cesareans and had been told a VBAC was off the table. After a careful review of her records and a real conversation about the evidence, she learned that a trial of labor after two cesareans is considered reasonable. She felt seen for the first time in the process. Second opinions are not about shopping for the answer you want. They are about making sure your decision rests on complete, current information.

This is exactly the kind of care The Midwife & More is built around. Christy Cannon, CNM, WHNP-BC, is the first Certified Nurse-Midwife to offer holistic birth at Los Robles Hospital in Thousand Oaks, blending personalized midwifery care with the safety net of a hospital and an experienced collaborating physician, Dr. Thomas Cachur, who has more than 25 years of practice and is on call. It is a model designed for people who want both warmth and a strong plan.

Try the Tool, Then Talk It Through

This site includes an interactive "Am I a VBAC Candidate?" tool that can give you a helpful starting sense of where you might fall. Think of it as a conversation starter rather than a verdict. Your true, personalized assessment happens at a consultation, where your operative records, your health, and your hopes are all considered together.

Frequently Asked Questions

Does a horizontal scar on my belly mean I had a low-transverse uterine incision?

Not necessarily. The skin incision and the uterine incision can differ. The only way to know your uterine scar type for certain is to review the operative report from your cesarean.

Can I have a VBAC after two cesareans?

For many people, yes. ACOG considers a trial of labor reasonable after two prior low-transverse cesareans, especially when other favorable factors are present. This is a strong reason to seek individualized counseling.

My baby is measuring big. Does that rule me out?

No. Estimated fetal weight is an imprecise measurement, and a suspected large baby by itself is not a contraindication to TOLAC. It is simply one factor among many your provider will discuss with you.

How is my candidacy actually determined?

Through a conversation with a qualified provider who reviews your operative records, your current pregnancy, your overall health, and your personal goals. No calculator or article replaces that individualized review.

Ready to Find Out Where You Stand?

If you are in Ventura County or the western Los Angeles area, including Thousand Oaks, Westlake Village, Agoura Hills, Newbury Park, Simi Valley, Moorpark, Camarillo, Oak Park, or Calabasas, The Midwife & More offers a free birth consultation to help you understand your options. The office is located at 5115 Clareton Drive, Suite 100, Agoura Hills, CA 91301. You can call (805) 558-5145 to schedule. As a concierge practice, care is out-of-network and may be reimbursable through PPO plans.

For deeper reading, the ACOG resources on VBAC and the NIH/PubMed StatPearls chapter, "Vaginal Birth After Cesarean Delivery", are excellent, evidence-based references.

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*Medical disclaimer: This article is for educational purposes only and is not medical advice. It does not replace an individualized evaluation. Your VBAC candidacy can only be determined by a qualified provider who reviews your operative records and your complete medical history. Always consult your own midwife or physician about your specific situation.*