Contraction timer: how to track labor and when to go to the hospital

Contraction timer: how to track labor and when to go to the hospital

This article is for informational purposes only and is not medical advice. Every pregnancy is different. Always consult your healthcare provider, OB-GYN, or midwife for guidance specific to your situation. If you are unsure whether you are in labor or experience any warning signs, call your provider or go to the hospital immediately.

Timing contractions is one of the first things you will do when labor begins. Accurate tracking helps you understand where you are in the labor process and gives your healthcare provider the information they need to advise you. Here is how to time contractions correctly, what the numbers mean, and when it is time to head to the hospital.

What are contractions

Contractions are the rhythmic tightening and releasing of your uterine muscles. During labor, contractions serve a specific purpose: they gradually dilate (open) and efface (thin) the cervix so the baby can move through the birth canal.

A contraction feels like a wave. It starts with a building tightness or pressure, peaks in intensity, then gradually fades. Early contractions may feel like menstrual cramps or lower back pain. As labor progresses, they become stronger, longer, and closer together.

When to start timing

Start timing contractions when you notice a regular pattern. Occasional tightening throughout the third trimester is normal, but when contractions begin coming at somewhat regular intervals, that is when tracking matters.

You do not need to time every contraction from the first twinge. Wait until you notice them coming consistently, roughly every 10-15 minutes, before you begin recording.

Use a contraction timer to track each contraction automatically. Tap once when a contraction starts, tap again when it ends. The timer records the duration and calculates the interval between contractions for you.

How to time contractions: duration and interval

Two measurements matter:

Duration is how long a single contraction lasts, measured from the moment you feel it begin to the moment it completely fades. Early labor contractions typically last 30-45 seconds. Active labor contractions last 45-60 seconds. Transition contractions can last 60-90 seconds.

Interval (or frequency) is the time between the start of one contraction and the start of the next contraction. This is measured start-to-start, not end-to-start. If one contraction begins at 2:00 PM and the next begins at 2:07 PM, the interval is 7 minutes, regardless of how long each contraction lasted.

Track both numbers for every contraction. Write them down or use a contraction timer that logs them automatically. Your provider will ask for both when you call.

The 5-1-1 rule

The most widely taught guideline for when to head to the hospital is the 5-1-1 rule:

• Contractions are 5 minutes apart (measured start to start)
• Each contraction lasts 1 minute
• This pattern has continued for 1 hour

When all three criteria are met, most providers recommend leaving for the hospital or birth center. Some providers use a 4-1-1 or 3-1-1 rule depending on factors like your distance from the hospital, whether this is your first baby, or specific risk factors. Confirm the specific guideline your provider wants you to follow during a prenatal visit, ideally during your third trimester.

For second or subsequent pregnancies, labor often progresses faster. Your provider may advise heading in sooner, such as when contractions are 7-8 minutes apart.

Early labor vs active labor vs transition

Labor has three stages, and timing patterns differ in each:

Early labor (latent phase): Contractions come every 5-20 minutes and last 30-45 seconds. Cervix dilates from 0 to about 6 centimeters. This phase can last hours or even days, especially for first-time mothers. Most providers recommend staying home during early labor where you can move, eat, hydrate, and rest.

Active labor: Contractions come every 3-5 minutes and last 45-60 seconds. Cervix dilates from 6 to about 8 centimeters. Contractions are significantly more intense. This is typically when you should be at the hospital.

Transition: Contractions come every 2-3 minutes and last 60-90 seconds with very short rest periods between them. Cervix dilates from 8 to 10 centimeters. This is the most intense phase but also the shortest, usually lasting 30 minutes to 2 hours.

Braxton Hicks vs real contractions

Braxton Hicks contractions (sometimes called "practice contractions") are common in the second and third trimesters. Here is how to tell them apart from real labor:

| | Braxton Hicks | Real contractions |
|---|---|---|
| Pattern | Irregular, no consistent interval | Regular, getting closer together |
| Duration | Usually under 30 seconds | 30-90 seconds, getting longer |
| Intensity | Mild, do not increase | Progressively stronger |
| Location | Often just the front of the abdomen | Wrap around from back to front |
| Response to movement | Often stop when you change positions or walk | Continue regardless of activity |
| Response to hydration | Often stop after drinking water | Continue regardless |

If contractions stop when you change positions, drink water, or rest, they are likely Braxton Hicks. Real labor contractions will persist and intensify no matter what you do.

What to track

For each contraction, record:

1. Time it started (hour:minute:second)
2. Duration (how many seconds it lasted)
3. Interval (minutes since the last contraction started)
4. Intensity (mild, moderate, or strong, this is subjective but useful for spotting progression)

A contraction timer handles the first three automatically. You can note intensity separately. After tracking 6-8 contractions, you will have enough data to see a pattern. You can also use a stopwatch for manual tracking if you prefer to log entries by hand.

For a broader overview of different timer types and when to use each, see the types of timers guide.

When to call your doctor

Call your healthcare provider when:

• Contractions follow the 5-1-1 pattern (or whatever pattern your provider specified)
• Your water breaks, whether or not you are having contractions
• You notice bright red bleeding (not just the "bloody show," which is a small amount of pink or brown mucus)
• You feel a significant decrease in fetal movement
• You have a severe, constant headache, vision changes, or sudden swelling in the face or hands (possible signs of preeclampsia)
• You are less than 37 weeks pregnant and having regular contractions (possible preterm labor)
• Something feels wrong, trust your instincts

When you call, have your contraction log ready. Your provider will ask how far apart contractions are, how long they last, and how long this pattern has continued.

When to go to the hospital

Go to the hospital when:

• Your provider tells you to come in after reviewing your contraction data
• Your water breaks with a gush (a slow leak may warrant a call first)
• You meet the 5-1-1 rule and have confirmed with your provider
• You cannot talk or walk through contractions
• You feel the urge to push

If this is your first baby and you live within 30 minutes of the hospital, you generally have more time than you think during early labor. If this is your second or subsequent baby, or you live far from the hospital, err on the side of leaving earlier. Discuss your specific plan with your provider before your due date.

Contraction timer app vs manual tracking

Digital contraction timer: Tap start and stop. The app calculates duration, interval, and tracks your full history. You get a clear log to show your provider. A contraction timer is the simplest option because it eliminates math and keeps a running record.

Manual tracking: Use a watch or clock with a second hand. Write down the start time and end time of each contraction in a notebook or on your phone's notes app. Calculate duration and interval yourself. This works but is harder to maintain when contractions become intense and frequent.

The best method is whichever one you will actually use. Set up your tracking tool before your due date, during the third trimester, so it is ready when you need it. Practice using it once or twice so the interface is familiar. When real contractions start, the last thing you want is to figure out how a new tool works.

Prepare your tracking plan now

Before labor begins, discuss the following with your healthcare provider: which timing rule they want you to follow (5-1-1, 4-1-1, or other), their preferred method of contact when labor starts (phone, patient portal, or hospital triage line), and any factors specific to your pregnancy that might change when you should head in. Write these instructions down and keep them where both you and your birth partner can find them easily.

Remember: this guide is for general education. Your healthcare provider knows your medical history and pregnancy details. Always follow their specific guidance over any general information you read online.