Labor Induction: Methods and What to Expect
Labor induction means starting labor artificially before it begins on its own. About 1 in 4 labors in the US are induced. Here's what drives that decision and what to expect.
Reasons for Induction
Common medical reasons include:
- Post-term pregnancy (beyond 41–42 weeks)
- Gestational hypertension or preeclampsia
- Gestational diabetes with poor control
- Intrauterine growth restriction (IUGR)
- Reduced amniotic fluid (oligohydramnios)
- Premature rupture of membranes without labor starting
- Cholestasis of pregnancy
- Elective induction at 39+ weeks (now considered acceptable per ARRIVE trial)
Cervical Ripening Methods
If the cervix is not yet soft and dilated ("unfavorable cervix"), ripening is needed first:
- Prostaglandin medications (misoprostol/Cytotec, Cervidil): Softens and dilates the cervix
- Foley balloon catheter: A catheter balloon inflated inside the cervix creates pressure that dilates it to ~4 cm
- Membrane stripping (sweep): Done in office — provider sweeps membranes from cervix, releases prostaglandins
Pitocin (Synthetic Oxytocin)
Pitocin is the most common induction drug, given as an IV infusion to start or strengthen contractions. Dose is gradually increased. Continuous fetal monitoring is required. Induced contractions with Pitocin are often perceived as more intense than spontaneous labor contractions. An epidural is very commonly used with Pitocin induction.
Frequently Asked Questions
No. The ARRIVE trial (2018) showed that elective induction at 39 weeks did not increase C-section rates and actually slightly reduced them for low-risk pregnancies. Earlier data suggesting induction increases C-sections was based on poorly cervix-matched comparisons.
It varies enormously. If the cervix is favorable, Pitocin alone may result in birth within 12–24 hours. If cervical ripening is needed first, the whole process can take 24–48 hours or more.
Current ACOG guidelines allow light eating in early labor. Ask your hospital's specific policy. Eat a good meal before your admission time.