A single Braxton Hicks contraction typically lasts 30 seconds to 2 minutes. These contractions are irregular, meaning they don’t follow a predictable pattern, and they usually stop on their own with rest or hydration. While they can feel alarming, especially during a first pregnancy, they’re a normal part of pregnancy and not a sign that labor is starting.
How Long Each Contraction Lasts
Most Braxton Hicks contractions last somewhere between 30 seconds and 2 minutes, though many fall closer to the shorter end of that range. They tend to feel like a tightening or hardening across your belly rather than a deep, building pain. You might notice your abdomen feels firm to the touch during one, then gradually softens as it passes.
Unlike true labor contractions, which grow longer and more intense over time, Braxton Hicks don’t follow a progression. One might last 45 seconds, the next might last a minute and a half, and then you might not feel another for hours. They can also start strong and then weaken, which is essentially the opposite of what real labor does. This inconsistency is one of the most reliable ways to tell them apart from the real thing.
When They Start During Pregnancy
Braxton Hicks can begin as early as the second trimester, around 20 weeks. Many women don’t notice them until the third trimester, though, because earlier ones tend to be mild enough to miss entirely. They become more frequent and more noticeable as your due date approaches, which is part of why they’re sometimes mistaken for early labor in the final weeks.
First-time mothers often notice them more acutely simply because the sensation is unfamiliar. Women in subsequent pregnancies may recognize them quickly and pay less attention. Either way, they’re a normal occurrence in both the second and third trimesters.
What Triggers Them
The most common trigger is dehydration. Even mild dehydration can set them off, which is why drinking water is often the first thing recommended when they start. But several other triggers are well established:
- Physical activity: Being on your feet for a long stretch or exercising can bring them on.
- A full bladder: The pressure from a full bladder against the uterus can prompt tightening.
- Fetal movement: A particularly strong kick or stretch from the baby can trigger one.
- Lifting something heavy: The exertion involved puts extra demand on the uterine muscles.
- Sexual activity: Orgasm causes uterine contractions on its own, which can overlap with Braxton Hicks.
- Illness: A cold, the flu, or vomiting can all increase their frequency.
Knowing your triggers helps, because in most cases removing the trigger stops the contractions within a few minutes.
How to Make Them Stop
The simplest approach is to change whatever you’re doing. If you’ve been active, sit or lie down. If you’ve been sitting for a long time, get up and walk slowly. Drink a full glass of water, since dehydration is the most frequent culprit. Empty your bladder if it’s full. A warm (not hot) bath can also help relax the uterine muscles.
If the contractions are genuinely Braxton Hicks, these steps will usually make them fade within 15 to 30 minutes. That’s actually one of the key diagnostic features: true labor contractions keep going regardless of what you do, while Braxton Hicks respond to rest and hydration.
Braxton Hicks vs. True Labor
The distinction matters most in the final weeks of pregnancy, when Braxton Hicks become more frequent and true labor becomes a real possibility. There are four main differences to watch for.
Pattern. True labor contractions come at regular intervals and develop a recognizable rhythm. Braxton Hicks are sporadic, with no consistent spacing between them.
Intensity. Real contractions get progressively stronger over time. Braxton Hicks stay about the same intensity or may actually weaken as they continue.
Location. True labor pain typically starts in the back and wraps around to the front. Braxton Hicks are usually felt only in the front of the abdomen.
Response to rest. Lying down and drinking water will stop Braxton Hicks. True labor continues no matter what position you’re in or how much water you drink.
Timing your contractions is the most practical step if you’re unsure. Write down when each one starts, how long it lasts, and how many minutes pass before the next one. If you see a clear, repeating pattern with contractions getting closer together, that’s worth paying attention to. If the intervals are all over the place, you’re likely dealing with Braxton Hicks.
When Braxton Hicks Need Attention
On their own, Braxton Hicks are harmless. But certain patterns can signal something else is going on. If you’re having more than four contractions in an hour before 37 weeks, that could indicate preterm labor rather than Braxton Hicks. The same applies if the contractions are accompanied by vaginal bleeding, fluid leaking, persistent lower back pain, or pelvic pressure that feels different from the usual tightening.
Contractions that don’t stop after resting and drinking water also warrant a call, especially if they seem to be getting stronger or more regular. Sometimes the only way to tell Braxton Hicks from true labor with certainty is a cervical exam, which checks whether your cervix is dilating. If you’re genuinely uncertain, calling your provider is always reasonable. They field these calls constantly and would rather check than have you wait.