Contractions are your body's way of opening the cervix so your baby can be born. They are the most fundamental signal that labor has begun. But not all contractions mean labor is underway.
This guide explains what contractions are, how to tell Braxton Hicks from the real thing, and what to do when they start.
What are contractions?
A contraction is a tightening of the uterine muscle. The uterus is one of the body's most powerful muscles, and when it contracts, it draws the cervix upward and outward. Over time, this causes the cervix to dilate enough for the baby to pass through.
Contractions are driven by the hormone oxytocin. The body gradually increases production toward the end of pregnancy. When levels are high enough, labor begins.
During a contraction, the whole uterus tightens. Your belly feels hard. When the contraction releases, the muscle relaxes. This alternating tension and release is what progressively opens the cervix.
Braxton Hicks vs. real contractions
Many pregnant people experience Braxton Hicks contractions from mid-pregnancy onward. They can feel like real contractions and cause confusion. Here are the differences:
| Braxton Hicks | Real contractions | |
|---|---|---|
| Pattern | Irregular, no fixed rhythm | Regular, getting closer together |
| Duration | 15–30 seconds | 30–90 seconds, getting longer |
| Intensity | Mild, uncomfortable | Strong, gradually increasing |
| Effect of movement | Disappear with position change | Continue no matter what you do |
| Location | Mostly at the front of the belly | Starts in the back, spreads around |
| Timing | Often in the evenings | Throughout the day and night |
| Cervix | No dilation | Gradual dilation |
When do Braxton Hicks start?
Most people notice Braxton Hicks from around weeks 20–28, though they can come earlier or later. They are completely harmless and are the body's way of preparing. Braxton Hicks often become more frequent toward the end of pregnancy, especially in weeks 36–40.
What triggers Braxton Hicks?
Common triggers include dehydration, a full bladder, physical activity, sex, and the baby moving a lot. Braxton Hicks are a normal part of late pregnancy, not a sign that labor is starting.
How to tell them apart
Use this simple test: change position, drink a glass of water, and rest for 30 minutes. If the contractions stop, they were Braxton Hicks. If they continue and become stronger, they are likely the real thing.
Not sure whether contractions are real? Time them for 30–60 minutes using a contraction timer app. Real contractions show a clear pattern — regular intervals, increasing duration.
Early signs that labor is approaching
Before real contractions start, the body often gives other signals that labor is near. These can appear days or hours before:
- Mucus plug comes away. Clear or blood-tinged mucus from the cervix. Can happen days or hours before labor. Some people don't notice it at all.
- Waters break. Amniotic fluid comes as a gush or a trickle. Call your hospital regardless of how much fluid there is.
- Backache. Constant, deep aching in the lower back that comes and goes.
- Baby drops. The baby settles lower into the pelvis, and breathing becomes easier.
- Loose stools. Many people experience looser stools or more frequent bathroom visits in the days before labor.
- Nesting urge. A sudden impulse to clean, organize, and get everything ready.
These signs can appear in any order, and some people experience few or none of them before contractions start. This is completely normal.
What do contractions feel like?
The experience is individual, but most people describe a progression through the stages of labor.
Early labor (0–4 cm dilation)
Contractions feel like period cramps or pressure in the lower back. They last 30–45 seconds and come every 5–20 minutes. You can still talk and move normally between contractions.
Many describe it as powerful menstrual cramps that come in waves — building up, peaking, then releasing. Early labor can last from a few hours to more than a day, especially for first-time parents.
Active labor (4–7 cm dilation)
Contractions are stronger and last 45–60 seconds. They come every 3–5 minutes. You need to concentrate during contractions and may not feel like talking.
The pain spreads around the belly like a belt. Many feel strong pressure against the spine. This is the longest phase of active labor.
Transition phase (7–10 cm dilation)
The most intense phase. Contractions last 60–90 seconds with short gaps. Many people experience shaking, nausea, or a feeling of losing control. Transition is fortunately brief — usually 30–90 minutes.
Pushing contractions
When the cervix is fully dilated, contractions change character. You feel a powerful urge to push downward. Your midwife or care provider will guide you through this phase.
Contraction patterns: How they develop
Understanding how contractions progress through labor can help you feel more oriented. Here is a typical progression:
Early phase — preparation
| Timing | Duration per contraction | Interval | Dilation |
|---|---|---|---|
| Start | 30–40 seconds | 15–20 minutes | 0–1 cm |
| After a few hours | 40–50 seconds | 10–15 minutes | 1–3 cm |
| End of early phase | 45–60 seconds | 5–7 minutes | 3–4 cm |
Early labor can last from a few hours to over a day for first-time parents. Spend this time at home. Eat lightly, drink fluids, and rest between contractions.
Active phase — opening
| Timing | Duration per contraction | Interval | Dilation |
|---|---|---|---|
| Start of active labor | 60 seconds | 4–5 minutes | 4–5 cm |
| Midway | 60–75 seconds | 3–4 minutes | 5–7 cm |
| Nearing transition | 75–90 seconds | 2–3 minutes | 7–8 cm |
By now you should be at the hospital. Contractions are more intense and require full focus. Most people need some form of pain relief during this phase.
Transition phase
| Timing | Duration per contraction | Interval | Dilation |
|---|---|---|---|
| Transition | 60–90 seconds | 1–2 minutes | 8–10 cm |
The most intense, but also the shortest phase. Many people experience shaking, nausea, and a feeling of losing control. Your midwife is with you the entire time.
Use a contraction timer app to record your contractions. It calculates duration and intervals automatically and shows you the pattern. You can share the data with the hospital when you call.
How to cope with contractions at home
Most people spend early labor at home. Here is what helps:
Movement
Walk around the house or neighborhood. Movement helps the baby position correctly and can reduce pain. Alternate between walking, standing, and sitting. Being upright is beneficial because gravity helps the baby move down.
Warmth
A warm bath or shower can significantly ease the pain. A heated pad against the lower back is also effective. Water should feel comfortable, not too hot.
Breathing
Deep, slow breathing helps the body relax between contractions. Breathe in through the nose for 4 counts, out through the mouth for 6 counts. Focus on the out-breath — a long exhale activates the parasympathetic nervous system and reduces tension.
Massage
Ask your partner to massage the lower back with firm pressure during contractions. Counter-pressure against the lower back is especially effective if the baby is positioned against your spine.
Positions
Try different positions to find what's most comfortable:
- Hands and knees. Takes pressure off the back and helps the baby rotate.
- Leaning forward. Against a wall, over a chair, or over a birth ball.
- Side lying. Lying on the left side with a pillow between the knees.
- Sitting on a birth ball. Rocking gently from side to side.
- Standing with support. Leaning against your partner or a wall.
Rest
Rest between contractions, especially during early labor. Lie on your left side, close your eyes, and conserve energy. Labor can be long, and you need reserves for the active phase.
Eating and drinking
Eat light food (fruit, toast, yogurt) and drink water in early labor. Your body needs energy. As contractions intensify, appetite naturally fades — sips of water are fine.
The 5-1-1 rule: When to go to the hospital
What is the 5-1-1 rule?
The 5-1-1 rule is the most widely used guideline for when to head to the hospital:
- Contractions coming every 5 minutes
- Each contraction lasting at least 1 minute
- This pattern has been consistent for at least 1 hour
For those who have given birth before, some providers use 7-1-1 (every 7 minutes), as labor tends to progress faster.
Call your hospital when:
- Contractions follow the 5-1-1 pattern (or 7-1-1 for subsequent births)
- Waters break, especially if the fluid is green or brown
- You have significant bleeding (more than a little blood in mucus)
- Baby's movements seem reduced
- You're unsure and need advice
Constant abdominal pain with no pause between contractions, heavy bleeding, or reduced fetal movements? Call your hospital immediately. Don't wait.
Go to the hospital immediately if:
Regardless of contraction pattern, call for emergency care if:
- Waters have broken and are green or brown (possible meconium)
- Heavy bleeding (more than a normal period)
- Baby's movements have noticeably decreased
- Constant pain with no break between contractions
- You are before week 37
- Something feels wrong — trust your instincts
Pain relief during labor
You have several options for pain management. It helps to know your options in advance. Discuss your preferences with your midwife and include them in your birth plan.
Natural methods
- Warm bath or shower — Many people find warm water the most effective natural pain relief. Birthing pools are available at many hospitals and birth centers.
- Movement — Walking, dancing, rocking — movement eases pain and helps the baby down
- Breathing techniques — Deep, rhythmic breathing with a long exhale
- Massage and counter-pressure — Your partner can apply firm pressure to the lower back
- TENS machine — Electrical stimulation that can reduce pain, especially in early labor (available for hire at some pharmacies)
- Acupuncture — Available at some hospitals and birth centers
Medical pain relief
- Gas and air (nitrous oxide/Entonox) — Self-administered inhaled gas. Takes effect within seconds and clears quickly. Available at most hospitals.
- Epidural — The most effective form of pain relief. Numbs from the abdomen downward. Placed by an anesthesiologist. Can be given at any point during active labor.
- Opioid injection (pethidine/morphine) — Injectable pain relief that promotes relaxation. Most commonly used in early labor.
- Pudendal block — Local anesthetic to the pelvic floor, most often used during the pushing stage.
According to the WHO, every person has the right to adequate pain relief during labor. Speak with your care team about what's available at your specific hospital or birth center.
Your partner's role during contractions
Your partner has a crucial role during labor. Here are concrete things they can do:
During early labor (at home):
- Time contractions — Use a contraction timer and keep track of the pattern
- Prepare food and drinks — Make sure you're eating and staying hydrated
- Create calm — Dim the lights, put on music, keep visitors away
- Encourage you — Confirm that you're doing well and handling it
During active labor (at the hospital):
- Call the hospital — Report contraction frequency and duration
- Apply counter-pressure — Firm pressure with a fist on the lower back during contractions
- Breathe together — Breathe alongside you, especially during intense contractions
- Be your advocate — Communicate with the care team when you can't
- Stay calm — Your calm is contagious
Pelvic floor preparation
Strong pelvic floor muscles help during the pushing stage and speed recovery after birth. The American College of Obstetricians and Gynecologists (ACOG) recommends pelvic floor exercises throughout pregnancy. Regular Kegel exercises — ideally daily — can be started in the first trimester.
Birth preparation checklist
Write a birth plan
A birth plan is a document describing your preferences for labor — pain relief, positions, who should be present. See our birth plan guide for how to create one.
Take a childbirth preparation class
Many hospitals and birth centers offer classes covering breathing techniques, pain management, and what to expect. See our birth preparation class guide.
Do pelvic floor exercises
Daily Kegel exercises from the first trimester prepare your body for labor and speed postnatal recovery.
Pack your hospital bag
Have your bag ready from week 36. Essential items include:
- For labor: Comfortable clothing, warm socks, lip balm, hair tie, phone charger
- After birth: Nursing bra, large underwear, maternity pads, going-home outfit for you and baby
- For baby: Onesie, sleepsuit, hat, outer layers for the season, car seat in the car
- Practical: Birth plan, insurance card, ID, charging cable, snacks
Frequently asked questions
Can Braxton Hicks turn into real contractions?
Braxton Hicks are harmless and go away on their own. They can't "become" real contractions. But it's normal to experience increasingly frequent Braxton Hicks toward the end of pregnancy. When real labor starts, you'll notice a clear difference in intensity and regularity.
What do contractions feel like?
Most people describe them as powerful menstrual cramps or waves that start in the back and spread around the belly. They build up, peak, then release. In early labor, they feel like period pain. They gradually become stronger and more intense. The experience varies a lot from person to person.
How long does labor last?
For first-time parents, active labor averages 8–12 hours. For those who have given birth before, typically 4–6 hours. There is wide variation — some births take a few hours, others over a day. These figures don't include early labor, which can be prolonged.
What should I do if my waters break without contractions?
Call your hospital. It's important to get medical assessment when the membranes have ruptured. Note the time, color, and amount of fluid. Most people go into labor on their own within 24 hours. If not, the hospital will discuss options for induction.
How do I know whether it's contractions or just back pain?
Real contractions have a clear pattern: they come at regular intervals, grow stronger over time, and last longer as they progress. Ordinary pregnancy backache is more constant and doesn't change in intensity. Try changing position — real contractions continue regardless. A contraction timer helps you see whether there's a pattern.
What if the birth happens very fast?
A very rapid birth (under 3 hours) is called precipitous labor. It is more common in those who have given birth before. If you feel a strong urge to push and won't make it to the hospital, call emergency services immediately. The operator will guide you until help arrives.
Can contractions come and go over several days?
Yes. This is called prodromal labor or pre-labor. Contractions may start and stop several times over days before active labor truly begins. It is exhausting, but normal — especially for first-time parents. Rest between episodes and conserve your energy.
Is an epidural always available?
Epidurals are available at most hospitals. You have the right to request adequate pain relief in labor. Speak with your care team about what's available at your specific hospital or birth center and include your preferences in your birth plan.
Further reading
- The 5-1-1 rule — when to go to the hospital
- The stages of labor
- How to write a birth plan
- Childbirth preparation classes
Sources
- WHO — Intrapartum care for a positive childbirth experience
- American College of Obstetricians and Gynecologists (ACOG)
- American College of Nurse-Midwives
- CDC — Labor and Delivery
Last updated: March 2026