The 5-1-1 rule is a simple guideline for knowing when to head to the hospital during labor: contractions coming every 5 minutes, each lasting 1 minute, for at least 1 hour. It gives you a concrete benchmark so you’re not guessing whether it’s time to go or whether you should keep laboring at home a bit longer.
What Each Number Means
The first number, 5, refers to the gap between contractions measured from the start of one contraction to the start of the next. When that gap shrinks to five minutes, your contractions are frequent enough that labor is likely progressing. The second number, 1, means each individual contraction lasts about one minute. Brief tightenings that fade after 20 or 30 seconds are common earlier in pregnancy and don’t carry the same significance. The final number, 1, is the consistency check: this pattern needs to hold for a full hour. A handful of close contractions that fizzle out after 15 minutes is a false alarm.
How to Time Contractions
Start your timer at the very beginning of one contraction, when you first feel the tightening or pain. Note when it ends to get the duration. Then note when the next contraction begins. The interval between contractions is measured start to start, not end to start. Most people use a phone app or a simple stopwatch. Writing down the times can help you spot a pattern more clearly than trying to remember them.
Early labor contractions are often irregular, maybe 10 to 20 minutes apart, lasting under 30 seconds. Over hours, they gradually become longer, stronger, and closer together. Once you’re consistently hitting that 5-1-1 pattern, it typically means your cervix is dilating and you’ve moved beyond the very early phase of labor.
True Labor vs. Braxton Hicks
Braxton Hicks contractions are mild, irregular tightenings in your abdomen that can start well before your due date. They often catch people off guard because they feel like something is happening, but they don’t follow a predictable rhythm. The key differences are straightforward:
- Pattern: True labor contractions get progressively stronger and closer together over time. Braxton Hicks stay irregular.
- Response to movement: True contractions continue no matter what you do. Braxton Hicks often stop when you walk, rest, or change position.
- Intensity: True labor contractions build in pain and are hard to talk through at their peak. Braxton Hicks feel more like a tightening than actual pain.
If you’re unsure, try changing what you’re doing. Take a walk if you’ve been sitting, or lie down if you’ve been active. Braxton Hicks will often fade. True labor won’t care.
How Long Active Labor Typically Lasts
Once labor is established, how long it takes varies enormously depending on whether you’ve given birth before. For first-time mothers, active labor lasts a median of about 7.5 hours, though it ranges widely. Some finish in under 3 hours; for others it stretches past 20. For those who’ve had a previous vaginal delivery, the median drops to about 3.3 hours, with some completing active labor in under an hour.
These numbers come from a large U.S. study of over 75,000 women laboring with minimal intervention. The takeaway is that first-time labor is roughly twice as long, which is one reason providers sometimes adjust the timing rule depending on your history.
Variations: 4-1-1 and 3-1-1
Your provider may tell you to use a 4-1-1 or even a 3-1-1 rule instead. The structure is the same, just with a shorter gap between contractions before you head in. Providers who recommend 4-1-1 want you to arrive a bit further into active labor, which can reduce the chance of being sent home. Those who suggest 3-1-1 are typically advising people who live far from the hospital or have a history of fast labor. The version your provider recommends will depend on your specific circumstances, so it’s worth asking during a prenatal visit which number they prefer for you.
When to Skip the Rule Entirely
The 5-1-1 rule is designed for routine, full-term labor. Several situations call for immediate contact with your provider or hospital regardless of contraction timing:
- Your water breaks: Whether or not contractions have started, a gush or steady trickle of fluid means you should call right away. If the fluid is discolored or has an unusual smell, that adds urgency.
- Vaginal bleeding: Light spotting can be normal, but heavier bleeding, more than just a pinkish mucus discharge, needs immediate attention.
- Reduced fetal movement: If your baby is moving less than usual, don’t wait to see if contractions reach a pattern.
- Preterm labor: If you’re less than 37 weeks pregnant and having regular contractions, call immediately. The 5-1-1 rule assumes you’re at or near your due date.
- Contractions lasting over 2 minutes: Individual contractions that go on for two minutes or more, or six or more contractions in a 10-minute window, are signs of unusually intense uterine activity that needs evaluation.
What Happens When You Arrive
Meeting the 5-1-1 threshold doesn’t guarantee you’ll be admitted. At the hospital, a provider will check how far your cervix has dilated and whether it’s thinning out. The active phase of labor is generally considered to begin around 6 cm of dilation. If you arrive at 2 or 3 cm, you may be asked to walk the halls for an hour or two and get rechecked, or you might be sent home to labor a little longer.
This can feel frustrating, but there’s a practical reason behind it. Being admitted too early can lead to interventions you might not need yet, simply because the clock starts ticking once you’re on the labor floor. Arriving when labor is well established tends to mean a smoother experience overall. If you do get sent home, it doesn’t mean something is wrong. It means your body is still in the warm-up phase, and the real work is ahead.