Most methods for having a baby earlier fall into two categories: medical induction scheduled with your provider, and natural techniques you can try at home to encourage labor. Both approaches work best when your body and your baby are ready, which generally means 39 weeks or later. Delivering even a couple of weeks before that carries measurable risks for your baby’s health, so timing matters more than most people realize.
Why 39 Weeks Is the Threshold
A pregnancy that reaches 39 weeks is considered full term. Deliveries at 37 to 38 weeks are classified as “early term,” and that distinction exists for a reason. Your baby’s lungs, liver, and brain go through a critical growth phase between weeks 37 and 39. Babies born at 37 weeks have a 9.4% rate of NICU admission compared to 5.0% at 39 weeks. Respiratory problems occur in 3.0% of 37-week deliveries versus 1.3% at 39 weeks. Those gaps are significant enough that medical guidelines discourage elective delivery before 39 weeks unless a health condition makes waiting riskier.
This doesn’t mean you’re stuck if you’re miserable at 39 or 40 weeks. A landmark trial published in the New England Journal of Medicine found that inducing labor at 39 weeks in low-risk first-time mothers actually lowered the cesarean delivery rate (18.6% versus 22.2% for those who waited) and reduced the chance of developing high blood pressure. So if you’re at or past 39 weeks, asking your provider about induction is a reasonable conversation to have.
Medical Reasons for Early Delivery
Certain conditions make delivering before your due date safer than continuing the pregnancy. These include gestational diabetes (especially if blood sugar is hard to control), high blood pressure or preeclampsia, infection in the uterus, problems with the placenta separating from the uterine wall, restricted fetal growth, and low amniotic fluid levels. If your water breaks and labor doesn’t follow, induction is also standard. In these situations, your provider will recommend a timeline based on the severity of the condition, sometimes as early as 34 to 37 weeks.
How Cervical Readiness Affects Your Options
Before any induction method can work well, your cervix needs to be softening and starting to open. Providers assess this using a scoring system that looks at five things: how dilated your cervix is, how thin it’s become (effacement), how soft it feels, its position, and how far down your baby’s head has dropped into your pelvis. A score above 8 on this scale generally signals that your body is primed for labor and induction is likely to succeed. A lower score means your cervix may need additional ripening before contractions will be productive, which is why some natural methods focus specifically on cervical preparation.
Membrane Sweeping
A membrane sweep is one of the simplest interventions your provider can offer. During a vaginal exam, they use a finger to separate the amniotic membranes from the lower part of the uterus, which releases hormones that can trigger contractions. In a randomized trial of women between 38 and 40 weeks, 91.4% of those who received a membrane sweep went into spontaneous labor, compared to 72.9% in the group that didn’t. It’s uncomfortable for a few minutes and can cause cramping and spotting afterward, but it often eliminates the need for a formal induction.
Natural Methods You Can Try at Home
Breast and Nipple Stimulation
Stimulating the nipples causes the uterus to contract, likely by increasing your body’s natural production of oxytocin, the same hormone used in medical inductions. In clinical studies, women were instructed to massage one breast at a time, alternating every 10 to 15 minutes, for sessions lasting about one hour, repeated up to three times per day. This method has enough evidence behind it that it’s been used in clinical settings, but it should only be tried at term and ideally after discussing it with your provider. Overstimulation can cause contractions that are too strong or too close together.
Castor Oil
Castor oil stimulates the intestines, which can trigger uterine contractions. In a large retrospective study of 824 women who received a castor oil cocktail, 49.5% went into labor without needing any additional induction. The complication rate was low at 4.2%, comparable to standard induction methods. The major downside is that it reliably causes diarrhea and nausea, which is not how most people want to start labor. If you’re considering it, talk to your provider first about dosing and timing.
Evening Primrose Oil
Evening primrose oil is often recommended for cervical ripening rather than directly starting labor. A meta-analysis of seven trials covering 920 women found that it significantly improved cervical readiness scores and shortened the time between starting the supplement and giving birth. Both oral and vaginal forms showed benefits. It did not, however, shorten the active pushing stage of labor. Think of it as a preparation tool rather than an induction method. It helps get your cervix ready so that when labor does start, things progress more smoothly.
What Doesn’t Have Strong Evidence
Walking, eating spicy food, having sex, drinking raspberry leaf tea, and eating dates are all commonly suggested. Some of these have small studies behind them, but none have the kind of rigorous evidence that breast stimulation, membrane sweeping, or castor oil do. That doesn’t mean they’re useless. Walking and sex are generally safe at term and won’t hurt anything. They’re just unlikely to push you into labor if your body isn’t already close to ready.
What to Expect During Medical Induction
If you and your provider decide on a medical induction, the process depends on how ready your cervix is. If it’s still firm and closed, the first step is cervical ripening, which can take 12 to 24 hours. Once your cervix is favorable, medications that stimulate contractions are given through an IV, and the dose is gradually increased until you’re having regular, strong contractions. Some women also have their water broken manually to speed things along.
Induced labor sometimes takes longer than spontaneous labor, especially for first-time mothers. Plan for the possibility of a full day or more in the hospital before your baby arrives. The contractions from induction can feel more intense and closer together than natural labor, so many women opt for pain relief earlier in the process. Induction does carry a slightly higher chance of needing a cesarean delivery compared to spontaneous labor at the same gestational age, though the 39-week induction data mentioned earlier suggests this gap is smaller than previously thought.
Practical Steps if You Want an Earlier Delivery
If you’re past 39 weeks and want to move things along, start with the lowest-risk options. Ask your provider about a membrane sweep at your next appointment. Try nipple stimulation at home using the one-breast-at-a-time approach for an hour, up to three times daily. Stay active with walking. Consider evening primrose oil for cervical preparation after discussing it with your provider.
If you’re before 39 weeks and just uncomfortable, the honest answer is that the safest approach is usually to wait. Every day between 37 and 39 weeks gives your baby’s brain and lungs meaningful development time. The discomfort of late pregnancy is real, but the window is short, and the benefits of those final weeks are well documented.