Vaginal Birth After Cesarean (VBAC) - What Affects VBAC Success
Pregnancy, labor, and
delivery are different for every woman and difficult to predict. Even if your
first pregnancy required a cesarean, the next one may not. The likelihood of a
vaginal birth after cesarean (VBAC) is influenced by
many things. Usually a combination of things affects how well or poorly a
trial of labor goes.
Your chances of a successful VBAC are best when:1
- Your previous cesarean was not done for stalled
- You do not have the same condition
that led to a previous cesarean (such as a
breech, or feet-down, fetus).
- You have had
a vaginal delivery or a successful VBAC before.
- Your labor starts on its own and your
cervix dilates well.
- You are younger than
Your chances of a successful VBAC are lower when:2
- Your previous cesarean was because of difficult
labor, which is called dystocia. This is especially true if you were fully
dilated when you had a cesarean section for dystocia.
- You are
- You are older than 35. 2
- Your fetus is very large [estimated as bigger
than 9 lb (4082 g)].
- You are beyond 40 weeks of pregnancy.
- Your last pregnancy was less than 18 months ago.
VBAC can be considered for pregnancies with twins.