When to Go to the Hospital — The 5-1-1 Rule and Why It's Not Always Right
The most common piece of pregnancy advice anyone repeats — 5-1-1, that's when you go to the hospital — is correct for a specific subset of pregnant patients in a specific context. It's also routinely misapplied to people for whom different rules apply.
Here's what 5-1-1 actually says, who it's for, and how to time contractions in the meantime.
The rule, stated clearly
5-1-1 means contractions are:
- 5 minutes apart — measured start-to-start
- 1 minute long — duration of each contraction
- For 1 hour — sustained pattern, not just one or two
Plus they're regular and getting more intense. All four conditions together are the standard "time to come in" threshold for first-time, full-term, low-risk pregnancies in most US institutions.
Who 5-1-1 doesn't apply to
The rule was developed for nulliparous (first-time mom) full-term patients without significant risk factors. People who shouldn't blindly use 5-1-1:
Multiparous patients — second, third, fourth babies often progress much faster. Many providers use 4-1-1 or even earlier thresholds for multiparous patients. A multipara who waits for 5-1-1 may end up giving birth in the car.
VBAC (vaginal birth after cesarean) — providers typically want to monitor earlier in labor due to the small but real risk of uterine rupture at the prior incision site. Often come in at first regular contractions is the instruction.
Group B strep positive — needs IV antibiotics during labor, ideally starting at least 4 hours before delivery. Coming in too late means the antibiotic dose isn't fully on board.
Pre-term (before 37 weeks) — any regular contractions warrant a call. Pre-term labor changes the conversation.
Twin / multiple pregnancies — different thresholds based on type and provider.
Hypertensive disorders / preeclampsia — different criteria.
Long distance from hospital — if you're an hour away and there's snow, you don't wait until 5-1-1.
Water has broken — coming in is recommended even without contractions, to assess and start the clock for delivery.
If your provider gave you a specific threshold (4-1-1, 3-1-1, "first contractions," "any time water breaks") — that overrides the generic 5-1-1.
How to time contractions properly
A contraction has a clear start and a clear end. The two measurements that matter:
- Duration — start to end of one contraction. Usually 30-90 seconds in active labor.
- Interval (also called frequency) — start of one contraction to start of the next. This is what "5 minutes apart" measures.
Note that interval is start-to-start, not end-to-start. If you measure end-to-start ("3 minutes between them") you'll think you're further along than you actually are.
The averages over the last hour of contractions are what matter, not any single one. Early labor is irregular. A pattern that meets criteria for one hour straight is the actual signal.
What to time, and when not to
You don't need to time every contraction in early labor. Doing so makes the time pass more slowly and creates anxiety. The reasonable cadence:
- Early labor — note contractions but don't time every one. If they're 10+ minutes apart, you have time. Eat something, rest, save energy.
- Active labor approaching — time them when they start feeling closer together (~7-8 minutes apart) to track progression.
- The hour that matters — when you suspect you're close to threshold, time consistently for an hour straight.
The contraction timer is a tool for that last category, not the whole journey.
When in doubt, call
The 5-1-1 rule is a threshold for not waiting longer, not a prohibition on calling earlier. Hospital triage nurses are happy to talk through what you're feeling and tell you whether to come in. A call is free; a delivery in the parking lot is not.
The other reasons to call regardless of timing:
- Bleeding (more than spotting)
- Decreased fetal movement
- Severe headache, vision changes, swelling, abdominal pain (preeclampsia signs)
- Water has broken
- Anything that feels significantly wrong
Skip the stopwatch math
The Contraction Timer has big start/end buttons (designed for active labor, not normal navigation). It tracks duration and interval over the last hour and surfaces a 5-1-1 alert when contractions meet the standard threshold — with an explicit "your provider may have given different instructions" caveat. On-device. No account.
The short version
5-1-1 is a default rule for first-time, full-term, low-risk pregnancies. It does not apply universally. Multiparous patients, VBAC, GBS+, pre-term, twins, hypertension, water broken — all warrant earlier calls. Time start-to-start (interval), not end-to-start. Average over the last hour, not a single contraction. When in doubt, call your provider's labor line.