Starting labor on your own is one of the most important things you can do to improve your chances of a successful VBAC. Women with one previous cesarean who go into spontaneous labor have a vaginal delivery success rate around 67%, compared to 50% when labor is medically induced. Spontaneous labor also carries a lower risk of uterine rupture: roughly 0.5% versus 0.8% to 2.2% with various induction methods. That gap is why so many VBAC candidates look for ways to get labor going naturally.
No natural method can guarantee labor will start, but several approaches have research supporting their ability to ripen the cervix, encourage contractions, and reduce the likelihood that you’ll need a formal induction.
Why Spontaneous Labor Matters for VBAC
Medical induction poses a specific challenge for women with a uterine scar. The medications used to soften the cervix and trigger contractions, particularly prostaglandins, can overstimulate the uterus and increase the risk of rupture at the scar site. One large study found a rupture rate of 0.52% with spontaneous labor, 0.77% with mechanical induction methods, and 2.22% with prostaglandin induction. That last number is why many providers avoid prostaglandins entirely in VBAC candidates.
Beyond safety, going into labor on your own simply works better. Your body’s natural signaling tends to produce a more coordinated labor pattern, and you arrive at the hospital with a cervix that’s already changing. Women who’ve had a previous successful vaginal delivery have the best odds, with VBAC success rates of 85% to 90%. The reason your first cesarean happened also matters: if it was for a breech baby or another positional issue, your chances of vaginal delivery this time are higher (around 84%) than if the original surgery was for stalled labor (64%).
Walking in Late Pregnancy
Regular walking is the simplest and best-supported lifestyle approach. A randomized clinical trial found that women who walked during late pregnancy arrived at the hospital with significantly more cervical readiness, measured by a higher Bishop score, the clinical rating system for how ripe the cervix is. The walking group had higher rates of spontaneous labor onset and lower rates of induction, cesarean delivery, and instrumental delivery, with no negative effects on the baby.
Multiple studies have confirmed the same pattern: physical activity during the final weeks of pregnancy is consistently associated with more spontaneous labor and less need for medical intervention. You don’t need intense exercise. Steady, daily walking is enough to encourage your baby to settle deeper into the pelvis and put gentle pressure on the cervix.
Nipple Stimulation
Nipple stimulation is one of the more effective natural methods, and it works through a straightforward mechanism: stimulating the nipples prompts your body to release oxytocin, the same hormone that drives contractions. In a Cochrane review comparing breast stimulation to no intervention, only 62.7% of women in the stimulation group were still not in labor at 72 hours, compared to 93.6% in the group that did nothing. That’s a meaningful difference.
The protocols used in research varied, but the common thread was gentle stimulation of one breast at a time. Some studies had women stimulate for one hour per day over three days. Others used three hours per day, split into sessions, alternating breasts every 10 to 15 minutes. A bonus finding: the stimulation group also had significantly lower rates of postpartum hemorrhage (0.7% versus 6%).
One important caveat for VBAC: because nipple stimulation can produce strong contractions, it’s worth discussing timing and approach with your provider. Most research was done in low-risk women, and overly intense uterine activity is something to be cautious about with a scarred uterus.
Eating Dates in the Final Weeks
Eating six to seven dates per day (about 70 to 75 grams) starting at 37 weeks has shown surprisingly strong results. In a study of 182 women, those who ate dates daily arrived at the hospital already dilated to an average of 4 centimeters, compared to 2.5 centimeters in the control group. The active phase of labor, the second stage, and the third stage were all significantly shorter.
Perhaps the most striking finding: only 5.5% of the date-eating group needed synthetic oxytocin to speed up labor, compared to 48.7% of the control group. Dates appear to have a natural ripening effect on the cervix, possibly because they contain compounds that mimic prostaglandins. This is a low-risk intervention with no known downsides for VBAC candidates, and the potential upside of arriving in labor with a more favorable cervix is exactly what you want.
Evening Primrose Oil
Evening primrose oil is widely recommended in midwifery circles, with more than 60% of U.S. nurse-midwives suggesting it in late pregnancy. A meta-analysis of seven trials involving 920 women found that it does improve cervical ripeness, whether taken orally or used vaginally. However, it didn’t significantly shorten the second stage of labor, and the overall evidence is described as mixed.
There’s no specific research on evening primrose oil in women with a prior cesarean scar. It works by providing fatty acids that the body can convert into prostaglandin-like substances, which soften the cervix. Because this is a gentler, slower-acting mechanism than medical prostaglandins, many midwives and providers consider it a reasonable option for VBAC candidates, but you should confirm this with whoever is managing your care.
Red Raspberry Leaf Tea
Red raspberry leaf tea is one of the most popular pregnancy herbal remedies, though the evidence is more modest than its reputation suggests. In a prospective study, women who used raspberry leaf had a larger proportion of vaginal births, shorter labor across all phases, and were significantly less likely to need medical augmentation during labor. That said, the study was small (91 women), and a larger study of 108 women found no statistically significant differences in outcomes, though labor was shorter in the raspberry leaf group by about 48 minutes in the second stage.
Raspberry leaf is thought to tone the uterine muscle rather than directly trigger contractions, which makes it more of a preparation tool than an induction method. Most women drink it as a tea starting around 32 to 36 weeks. It’s generally considered safe, but the research base is thin enough that strong claims in either direction aren’t warranted.
Membrane Sweeping
A membrane sweep, where your provider uses a finger to separate the amniotic membranes from the lower part of the uterus during a cervical exam, sits on the border between “natural” and “medical.” It’s done in a clinical setting, but it doesn’t involve any medications. A Cochrane meta-analysis found that sweeping reduces the number of women who go past their due date and lowers the need for formal induction.
For VBAC specifically, one comparative study found membrane sweeping to be safe, with no cases of uterine rupture in the sweep group (one case of scar thinning occurred in the control group). The study didn’t find a dramatic difference in labor onset rates or VBAC success rates between the sweep and control groups, but based on broader evidence, it may help avoid the post-dates situation that often leads to medical induction, which is exactly the scenario VBAC candidates want to prevent.
What to Be Cautious About
Castor oil is a popular folk remedy for starting labor, but it carries real concerns for VBAC. In a large hospital-based study, one complete uterine rupture and one partial rupture occurred following castor oil induction. The researchers explicitly stated that castor oil should not be used outside of a hospital setting and that continuous monitoring of labor and fetal heart rate is essential. Castor oil can cause intense, unpredictable contractions along with significant gastrointestinal distress, nausea, and diarrhea. For a uterus with a scar, that kind of uncontrolled stimulation is not worth the risk.
Any method that could produce sudden, strong contractions deserves extra caution when you have a uterine scar. This includes high-dose herbal supplements marketed as labor inducers, cohosh preparations, and aggressive nipple stimulation protocols. The goal with VBAC is a gradual, coordinated labor onset, not an abrupt one. Gentle cervical ripening and steady encouragement toward spontaneous labor are safer strategies than anything that forces the process.
Putting It All Together
The most practical approach combines several low-risk methods in the final weeks. Daily walking keeps your body active and encourages your baby into a good position. Starting dates at 37 weeks gives your cervix weeks of gentle preparation. Raspberry leaf tea and evening primrose oil may offer additional support, though neither is a guarantee. As you get closer to your due date, nipple stimulation and a membrane sweep can provide a more direct nudge toward labor.
Your single biggest advantage is time. The longer you can wait for labor to start on its own (within the bounds your provider is comfortable with), the better your odds. Every day your body moves toward labor naturally is a day you’re less likely to need the medical induction that lowers VBAC success rates and raises the stakes for your scar.