After my [emergency C-section](/blog/emergency-c-section-reasons) with my first I was told, very gently, that there was no medical reason I could not try for a vaginal birth next time. I had heard "once a C-section, always a C-section" so many times that this came as a surprise.
When I got pregnant 18 months later, I started reading about VBAC. The information was scattered. Some sites made it sound like a heroic, high-risk choice. Others made it sound completely normal. The actual conversation with my OB was the first time I got a clear picture of what the real VBAC success rates were, who was a good candidate, and what the actual risks were.
If you are pregnant after a previous C-section and considering whether to try for a vaginal birth, here is the honest version of that conversation, including the numbers, the eligibility rules, and what to actually expect during a VBAC labor.
What VBAC actually means
VBAC stands for vaginal birth after cesarean. It means going into labor and delivering vaginally in a subsequent pregnancy, despite having had a C-section previously.
The opposite option is ERCS, an elective repeat C-section, where you schedule another planned C-section instead of trying for vaginal birth.
The decision between VBAC and ERCS is one of the bigger decisions of the second pregnancy. It depends on multiple factors that are specific to your situation.
The real VBAC success rates
VBAC success rates vary based on your specific situation. The numbers worth knowing.
Overall success rate
For women who attempt VBAC after one previous C-section, the success rate is 60 to 80 percent. About 7 in 10 women who try will have a successful vaginal birth.
This is higher than many parents realize.
Success rates by reason for previous C-section
If your previous C-section was for a one-off reason (breech baby, fetal distress, cord prolapse, placenta previa), your VBAC success rate is at the higher end, often 75 to 85 percent. The reason for the previous C-section is unlikely to repeat.
If your previous C-section was for [failed induction or labor not progressing](/blog/failed-induction), your success rate is more like 55 to 65 percent. The reason that stopped your previous labor may or may not happen again.
If you have had a previous successful vaginal birth before or after the C-section, your VBAC success rate is 85 to 90 percent. The body has done it before.
Success rates by labor type
Women who go into spontaneous labor have a higher VBAC success rate (around 75 percent) than women who are induced for VBAC (around 65 percent). Spontaneous labor is the friend of VBAC.
Who is a candidate for VBAC?
Most women with one previous C-section are candidates for VBAC. The specific eligibility rules vary by hospital but generally include:
Usually a good candidate if you have:
- One previous lower-segment transverse C-section (the standard horizontal "bikini line" incision)
- No other major uterine surgery
- A baby in head-down position
- A single baby (not twins, though some hospitals do VBAC with twins)
- No new medical complications in this pregnancy
- A pregnancy that has reached at least 37 weeks
- A hospital that supports VBAC (this matters more than parents realize)
Usually not a candidate if you have:
- A previous classical (vertical) C-section incision
- A previous T-shaped or J-shaped incision
- Two or more previous C-sections (some hospitals will still consider VBAC with 2 previous C-sections, but the risk profile is higher)
- A previous uterine rupture
- A medical reason for C-section in this pregnancy (placenta previa, breech baby, twins above certain thresholds)
- A history of significant uterine surgery beyond the C-section
The eligibility decision is made with your OB based on your notes from the previous birth. If you do not have those notes, request them from the hospital where you delivered.
The risk that gets all the attention: uterine rupture
The reason VBAC has any controversy at all is the risk of uterine rupture. This is when the scar from the previous C-section opens during labor.
The real numbers:
- Uterine rupture risk in VBAC labor: about 1 in 200 (0.5%)
- Uterine rupture risk with elective repeat C-section: about 1 in 2,000 (0.05%)
So VBAC is about 10 times more likely to result in uterine rupture than ERCS in absolute terms. But the absolute risk is still small.
Most uterine ruptures during VBAC are managed successfully if recognized early, which is why VBAC is done in hospitals with continuous monitoring and immediate access to theater. With prompt treatment:
- Maternal mortality from uterine rupture: very rare
- Newborn outcome: most babies survive without long-term effects if the rupture is recognized quickly
The risk is real but small, and the safety net around VBAC labor is designed specifically to catch it.
Other risks worth knowing
A few other risks to weigh.
Risks higher in VBAC than ERCS
- Uterine rupture (as above)
- Need for blood transfusion during delivery (about 1 in 100 in successful VBAC, slightly higher if rupture occurs)
- Long labor with no progress, ending in C-section anyway (about 25 percent of VBAC attempts end in repeat C-section)
Risks higher in ERCS than VBAC
- Standard C-section risks: surgical infection, blood clots, bladder injury, longer recovery
- Higher risk in future pregnancies of placenta accreta (placenta growing into the C-section scar), which can be a serious complication
- More complicated recovery (4 to 6 weeks vs 1 to 2 weeks for vaginal birth)
- Higher risk of breathing problems in the newborn (because babies born vaginally have fluid squeezed out of their lungs)
- More limitations on future pregnancies (each subsequent C-section adds risk)
If you want more than 2 to 3 children, the cumulative risk of multiple C-sections often pushes the decision toward VBAC.
What VBAC labor actually looks like
If you are planning a VBAC, here is what to expect.
Where you give birth: VBAC is recommended in a hospital with continuous fetal monitoring and 24/7 OB and anesthesia coverage. Home birth is generally not recommended for VBAC.
Continuous monitoring: You will be on a fetal heart rate monitor throughout active labor. Most hospitals now have wireless monitors that allow you to move around. Some only have wired monitors, which limit mobility.
No induction with prostaglandin: Most hospitals do not use prostaglandin gel or pessary in VBAC because it slightly increases uterine rupture risk. Spontaneous labor or balloon catheter induction is preferred.
Pitocin allowed cautiously: Pitocin can be used in VBAC if labor needs help, but at lower doses and with very close monitoring.
Epidural is fine: An epidural does not interfere with detecting uterine rupture and is fully compatible with VBAC.
Length of labor: Often similar to a first labor, even though it is technically a second pregnancy. The previous C-section means the body has not done full vaginal labor before in the same way.
Time limits: Some hospitals have stricter time limits on labor progress in VBAC than in non-VBAC labor. Worth asking what those are.
When VBAC is going well
If your VBAC labor is progressing normally:
- Cervix dilating as expected
- Baby's heart rate normal
- No signs of uterine rupture (severe abdominal pain between contractions, sudden change in heart rate pattern, vaginal bleeding)
- Mom feeling normal labor pain only
Most VBAC labors that get past 6cm dilated end in successful vaginal birth.
When VBAC needs to convert to C-section
About 1 in 4 VBAC attempts ends in repeat C-section. Reasons include:
- Labor not progressing (same as in any labor)
- Fetal distress
- Concerns about uterine rupture
- Maternal request for C-section during labor
A repeat C-section after VBAC attempt is not a failure. It is the system working as designed. The team trying VBAC, the team converting to C-section when needed, both serve the same goal of a healthy birth.
How to decide between VBAC and ERCS
The decision is personal and depends on:
Your previous C-section reason. If it was a one-off, VBAC success is more likely. If it was for failed induction, success rates are lower.
Your hospital. Some hospitals strongly support VBAC. Others have policies that effectively discourage it. Ask early.
Your family plans. If you want 3 or more children, multiple C-sections add cumulative risk. VBAC may be the better long-term choice.
Your feelings about birth. Some women find the planned, scheduled nature of ERCS reassuring. Others find the uncertainty of VBAC labor preferable. Both feelings are valid.
Risk tolerance. VBAC has a small but real rupture risk. ERCS has standard surgical risks. Different people weigh these differently.
Questions to ask your OB about VBAC
Before deciding, ask:
1. Am I a candidate for VBAC based on my specific situation? 2. What is the success rate at this hospital for women in my situation? 3. What kind of monitoring will I have during labor? 4. Are there any restrictions on labor positions, mobility, or pain relief? 5. What happens if labor needs to be induced? 6. At what point in labor would you consider converting to C-section? 7. Who would be the lead clinician overseeing my labor? 8. What is your hospital's policy on home birth or birth center VBAC? 9. Do I have to decide now or can I keep both options open?
What to tell yourself in the second pregnancy
Most women with a previous C-section can have a vaginal birth next time. The success rates are higher than the conversation usually suggests. The risks are real but small and well-managed in modern maternity care.
If you choose VBAC and it succeeds, you join the 70 percent who have a normal birth experience after a previous surgery. If you choose VBAC and it converts to C-section, you have not failed. You have tried, and the system worked to keep you and the baby safe. If you choose ERCS, that is also a fully valid choice with real benefits.
There is no wrong answer. There is the right answer for your specific situation, your specific risks, your specific support network, and your specific preferences. Talk to your OB, ask the questions, and trust your decision.
The baby arrives. The story you write about how is yours. Either way, you are doing it.