Short version: induction is about starting labor, and augmentation is about changing how labor that’s already happening is going. The longer version is below, because the same methods show up in both, and which word you hear changes the questions worth asking.
What’s the difference between labor induction and augmentation?
Labor induction is when your care team uses medical methods to try to start labor when it hasn’t begun on its own. Augmentation is when your care team uses medical methods to try and strengthen contractions or make them more regular.
The question underneath each one is different. Induction asks, “should we start labor?” Augmentation asks, “labor is happening, should we change how it’s going?” Induction is usually called by name and augmentation usually sounds like “let’s help things along.”
What medication and procedures are used for induction and augmentation?
Several tools can be used for both, which is part of why the two can blur.
Pitocin (synthetic oxytocin, a hormone your body naturally produces that causes your uterus to contract) is given through an IV and is used to start or strengthen contractions. In my experience, Pitocin can cause contractions to get longer, stronger, and closer together, and can help shorten labor, but everyone responds differently. Unlike a pill, Pitocin can be turned down or paused if you or baby need a break.
Breaking your water (also called artificial rupture of membranes, or AROM) may (or may not) strengthen contractions. It also makes it possible to place internal monitors to measure baby’s heart rate and your contractions.
A Foley balloon or catheter is used for inductions only. It mechanically opens the cervix, often over the course of several hours, and only to about 3-4cm - so if your cervix is already dilated to or past that point, it’s usually off the table.
A membrane sweep is when a provider uses a finger to gently separate the bag of fluid around your baby (also called the membranes) from your cervix, the lower part of your uterus, which may help labor start. A membrane sweep usually needs your cervix to be open at least 1cm and is often offered or done before labor starts.
Medication that softens and thins the cervix (often called cervical ripening) is common in induction. It can be a pill that you swallow, a pill placed in your vagina, or a small tampon-like insert with medication.
The same tool can be called induction in one room and augmentation in another, depending on whether labor had already started when it was offered. Whether you're deciding to start labor or to change how it's going shapes the questions to ask, how much time you may have, and what your options are.
What does augmentation actually look like?
In my experience, augmentation tends to be offered in a sentence that starts with “we could help labor pick up by …” Say, for example, you're admitted to the hospital at 4cm with regular contractions, and a few hours later your contractions have started to space out. Your options might include using Pitocin to help your contractions pick up again, and they might also include rest, a walk, or a snack. A quiet stretch doesn’t necessarily mean something has gone wrong (in fact, in my experience it’s common for labor to slow down when you get to the hospital).
I worked with someone who spent most of a day of her induction resting, expecting things to pick up on their own. When a provider offered to break her water, she asked what was driving the offer. Everything looked fine, and there wasn't a specific medical reason, so she decided to get up and move first, and her contractions picked up over the next few hours. What helped her was the question: "What are we trying to change?"
What can I ask if induction (starting labor) or augmentation (helping labor that's already started) is offered?
Two good questions for a prenatal appointment are: "Under what circumstances would you recommend an induction, and how flexible is the timing?" and "How does your practice approach labor that slows down? What's usually tried first, and how long do you typically wait?" That way, you know ahead of time what to expect.
A few questions you might ask in the moment are:
What are you seeing that makes you suggest this?
What are we trying to change?
What could we try first, or how long could we wait and re-check?
If this doesn't work as quickly as we hope, what's the plan, and how long will we give it?
What are the implications of this decision? What else would this change?
A tip from a doula
"Can we take an hour and come back to this decision?" gives you time to think, rest, and talk it over before you answer. If you’re not sure whether it’s urgent, ask: "Is this urgent, or do we have time to think?"
Does the research on induction and augmentation methods apply to me?
It's also worth knowing that much of the high-quality evidence on labor induction methods, and some of the evidence on augmentation methods, comes from studies of people who were at least 37 weeks’ pregnant, giving birth to one baby, and were considered “low risk.” Many studies also exclude people with a prior cesarean or other uterine surgery. Some include conditions like gestational hypertension or fetal growth concerns, but that evidence is less complete. How well the findings apply to you varies by method and by circumstance.
If your situation looks different from those typically included in studies, it's worth asking your provider specifically about the evidence for what they're offering you. (Source 1, Source 2, Source 3, Source 4, Source 5)
How a doula can help
I'm not a clinician, and I won't tell you whether to say yes or no to something, because that's your decision. What I can do is notice when a conversation shifts from "here's what's happening" to "here's what I'd like to do." I can ask clarifying questions if you'd rather not be the one asking, help you think through your options, and remind you that you can ask for a few minutes before answering.
Before labor, we can talk through these terms so they sound familiar when you hear them, and practice non-medical methods that might get labor going.
Explore this further
Evidence Based Birth podcast - Using Pitocin for augmentation and Tips for preparing for an induction
Evidence Based Birth - When labor slows down or stalls (sometimes called “failure to progress”)
Birth Vibes by Jen Hamilton has a great section on induction and augmentation, including the methods used, in chapter 9: Delivery Decisions.
Cleveland Clinic: Augmentation of labor - a plain-language overview of why and how labor is augmented
Bottom line: Induction starts labor, and augmentation changes how labor that's already happening is going. Whichever word you hear, a useful question is "what are we trying to change, and what could we try first?"
The moments described here are drawn from real experiences, but details have been changed and combined to protect the privacy of the families I've worked with.