Contractions feel like a rhythmic tightening and releasing of your entire uterus, and the clearest sign you’re having them is that your belly becomes noticeably hard during each episode. People commonly describe the sensation as intense menstrual cramps, a wave-like tightness that starts at the top of the uterus and moves downward, or a squeezing pressure across the whole abdomen. If you can place your hand on your belly and feel it firm up like a ball and then soften again, you’re feeling a contraction.
The harder question isn’t whether you’re having contractions. It’s whether those contractions mean anything. Your uterus can contract for weeks before labor without making any progress. What matters is the pattern: how regular they are, whether they’re getting stronger, and whether they stop when you change what you’re doing.
What Contractions Actually Feel Like
The sensation varies depending on the stage of labor and the person, but contractions generally start as a cramp or feeling of pressure low in the abdomen. Many people say it feels like a very strong period cramp that wraps around the belly. Others describe it as a squeezing or pushing sensation that radiates into the lower back and sometimes down into the legs. During a contraction, your entire belly hardens. Between contractions, your uterus relaxes and your belly softens again.
Early contractions tend to feel more like a dull ache or mild pressure. As labor progresses, they build in intensity. By the time you’re in active labor, contractions are strong, hard to talk through, and last 60 to 90 seconds each. The pain shifts from something you can breathe through to something that demands your full attention.
Practice Contractions vs. Real Labor
Braxton Hicks contractions are your uterus rehearsing for labor, and they can fool you. They cause the same hardening of the belly and sometimes real discomfort, but the key difference is that they aren’t coordinated. They may seem to follow a pattern for a while, but if you track them carefully, the intervals between them stay irregular. They don’t get closer together, they don’t get stronger over time, and eventually they taper off and disappear.
True labor contractions do the opposite. The intervals between them get shorter. Each one lasts a bit longer and hits harder than the last. And they don’t stop, no matter what you do. This is the most reliable distinction: real labor keeps building, while practice contractions stall out.
A simple test is to change your activity. If you’ve been sitting, stand up and walk around. If you’ve been on your feet, lie down. Drink a full glass of water. Braxton Hicks contractions often ease up or stop entirely when you shift positions or rehydrate. If the contractions keep coming regardless, that’s a stronger signal you’re in labor.
Prodromal Labor: The Gray Zone
Some people experience something frustratingly in between. Prodromal labor involves contractions that feel real, can come as close as five minutes apart, and last up to a minute each. They cause tightening or hardening in the front of your belly along with cramping. A single episode can drag on for several days.
What separates prodromal labor from the real thing is that these contractions never get stronger or closer together over time. They plateau. They don’t cause your cervix to dilate or thin out. There’s no evidence that prodromal labor jumpstarts real labor or speeds up the process when labor does begin. It’s genuinely uncomfortable and genuinely unproductive, which makes it one of the more mentally exhausting parts of late pregnancy.
How to Time Your Contractions
You need two measurements: frequency and duration. Use a clock, a watch, or a contraction timer app on your phone.
- Frequency: Time from the beginning of one contraction to the beginning of the next. This tells you how far apart they are.
- Duration: Time from when a single contraction starts to when it ends. This tells you how long each one lasts.
Track at least four or five contractions before drawing any conclusions. You’re looking for a trend. In early labor, contractions typically come every 10 to 15 minutes and last about 30 to 45 seconds. As labor progresses, they move closer to three to five minutes apart and last 60 seconds or more. By the pushing stage, contractions arrive every two to five minutes and last 60 to 90 seconds.
The general guideline many hospitals use is the 5-1-1 rule: contractions five minutes apart, lasting one minute each, for at least one hour. That pattern suggests active labor is underway.
What’s Happening Inside Your Body
Each contraction does mechanical work. As your uterus tightens, it pushes your baby downward. The baby’s head (if head-down) presses against your cervix. That pressure, repeated over hours, causes the cervix to soften, thin out, and eventually open. Your cervix goes from thick and firm to paper-thin and stretched wide enough for the baby to pass through. Early labor brings the cervix to about 6 centimeters of dilation, which typically takes 6 to 12 hours. Active labor opens it the rest of the way to 10 centimeters over another 4 to 8 hours.
This is why the pattern of contractions matters so much. Isolated or irregular contractions don’t generate the sustained, building pressure needed to change the cervix. Only coordinated contractions that grow in strength and frequency actually move labor forward.
Back Labor Feels Different
About a quarter of laboring people experience back labor, and it can feel confusingly different from what you’d expect. Instead of the classic belly-tightening sensation, the dominant pain is in the lower back. It’s often described as intensely painful or even excruciating, and unlike regular contractions, it can remain constant between contractions rather than letting up completely.
Back labor happens most often when the baby is facing your abdomen instead of your spine (called the occiput posterior position). In this position, the back of the baby’s skull presses directly against your lower spine and tailbone during contractions. Other contributing factors include having a short torso relative to the baby’s size, variations in pelvic shape, spinal conditions like scoliosis, or posture habits that tilt the pelvis forward.
If your labor pain is concentrated almost entirely in your lower back with muscle spasms radiating into your hips, you may be experiencing back labor rather than a different condition. The contractions are still real labor contractions. They just express themselves differently because of how the baby is positioned.
Preterm Contractions Before 37 Weeks
Contractions that occur between week 20 and week 37 of pregnancy need different attention. Preterm labor symptoms include regular or frequent belly tightening, a constant dull low backache, pressure in the pelvis or lower belly, mild abdominal cramping, vaginal spotting, or a change in vaginal discharge that’s watery, bloody, or mucus-like. A gush or steady trickle of fluid could mean your water has broken early.
Any of these symptoms before 37 weeks warrants immediate contact with your healthcare provider. Preterm contractions don’t always mean preterm delivery, but they need to be evaluated quickly because early intervention can make a significant difference in outcomes. Don’t wait to see if a pattern develops. With preterm symptoms, the threshold for getting checked is much lower than at full term.