A single Braxton Hicks contraction typically lasts anywhere from 30 seconds to about 2 minutes. Unlike real labor contractions, they don’t follow a predictable pattern, don’t get longer over time, and can stop as suddenly as they started. An episode of repeated Braxton Hicks may come and go over the course of an hour or two, but the contractions remain irregular and eventually taper off on their own.
What a Braxton Hicks Contraction Feels Like
Most people describe it as a tightening or hardening across the abdomen, almost like the belly is briefly turning into a ball. The sensation tends to stay focused in one area rather than radiating through the entire uterus. It’s uncomfortable but not usually painful, and the intensity stays roughly the same each time. Some contractions are barely noticeable, while others are strong enough to make you pause what you’re doing.
Real labor contractions, by comparison, start at the top of the uterus and move in a coordinated wave through the middle and down to the lower segment. They also get progressively stronger and longer over time, which Braxton Hicks never do.
When They Start and How They Change
Braxton Hicks contractions can begin as early as the second trimester, around week 20, though many people don’t notice them until the third trimester. Early on, they tend to be mild and infrequent enough that you might not recognize them at all.
As pregnancy progresses into the final weeks, Braxton Hicks often become more frequent and more noticeable. This is normal. Your uterus is a muscle, and these contractions are essentially practice runs, helping the muscle prepare for the work of labor. Even though they may pick up in the weeks before your due date, the key characteristic stays the same: they remain irregular. They don’t settle into a rhythm, and they don’t get closer together.
Common Triggers
Dehydration is the single most common trigger for Braxton Hicks. Even mild dehydration can set them off. Beyond that, several other everyday activities and situations can bring them on:
- Physical activity, including exercise, walking, or lifting something heavy
- A full bladder
- Fetal movement, such as a kick or shift in position
- Sexual activity
- Illness, particularly anything involving a fever, vomiting, or the flu
Noticing a pattern in your own triggers can help you manage them. If Braxton Hicks tend to ramp up after a long walk or when you’ve gone a few hours without water, the fix is often straightforward.
How to Tell Them Apart From Real Labor
The distinction matters most in the third trimester, when both Braxton Hicks and early labor are possible. There are a few reliable ways to tell the difference.
Timing is the most useful clue. True labor contractions come at regular intervals that get shorter over time. If you time your contractions and they’re five minutes apart, then seven, then four, then ten, that irregular spacing points strongly to Braxton Hicks. Real labor also produces contractions that get longer and more painful as hours pass, while Braxton Hicks stay about the same in intensity or actually fade.
Location matters too. Braxton Hicks tend to concentrate in one part of the abdomen. Real contractions typically involve a sensation that sweeps across or through the uterus, often accompanied by lower back pressure or pain that wraps around to the front.
The water test is one of the simplest checks. Hospitals often use this: if you arrive unsure whether you’re in labor, one of the first things staff will do (after checking the baby and your cervix) is have you drink several large glasses of water quickly. If the contractions are Braxton Hicks, they’ll usually stop fairly soon after you’re rehydrated. True labor contractions keep coming regardless.
How to Stop Them
Because Braxton Hicks are so closely tied to dehydration and physical exertion, the most effective strategies are simple. Drinking a full glass or two of water often resolves them within 15 to 30 minutes. Changing your position helps too. If you’ve been on your feet, sit or lie down. If you’ve been sitting for a while, get up and move gently. A warm bath can relax the uterine muscle and ease the tightening sensation.
Emptying your bladder is worth trying, since a full bladder can irritate the uterus enough to trigger contractions. Slow, deep breathing won’t stop the contractions themselves, but it can reduce the discomfort while you wait for them to pass.
When Braxton Hicks Signal Something Else
Braxton Hicks are a normal part of pregnancy, but certain patterns warrant attention. Contractions that come at regular intervals, get progressively stronger, or don’t stop after hydration and rest may be early labor, especially before 37 weeks. The same applies if contractions are accompanied by vaginal bleeding, a gush or steady leak of fluid, or a noticeable decrease in fetal movement. More than four to six contractions in an hour that follow a pattern is generally the threshold where it’s worth being evaluated, particularly in preterm pregnancy.