The 5-1-1 rule for contractions, explained

The 5-1-1 rule tells you when to call your hospital or head in. Contractions come about 5 minutes apart, last about 1 minute each, and keep this up for an hour. MetroHealth and Lamaze International both describe it this way. You may have heard it at a prenatal visit or in a childbirth class. Hospitals don’t all use the same cutoffs, though, and some signs mean you call right away, whatever the numbers say.

What the 5-1-1 rule means

The rule combines three checks, and all three should be true at the same time:

• Contractions come about every 5 minutes, timed from the start of one to the start of the next.
• Each contraction lasts about 1 minute, from the moment you feel the tightening begin until it’s gone.
• The pattern has held for about 1 hour.

MetroHealth, a hospital system in Cleveland, asks patients to come in and be checked after an hour of this pattern. Lamaze International describes contractions consistently 5 minutes apart, lasting 1 minute each, for at least an hour.

Some hospitals add a strength check on top. Scripps Health in San Diego builds one into its timing rules: you can’t talk or walk through a contraction. Boston Medical Center suggests you start timing once you can’t talk or laugh through them.

Where the 5-1-1 rule comes from

The 5-1-1 rule is a rule of thumb, and we could not trace it to a single published guideline. The American College of Obstetricians and Gynecologists (ACOG) doesn’t mention it in its patient FAQ on the start of labor. ACOG’s own advice is broader: if you think you’re in labor, or you’re not sure, call your ob-gyn or other obstetric care provider.

The rule shows up in hospital materials and childbirth education. MetroHealth and Scripps Health both use it in their patient information. Lamaze International writes that many care providers tell parents to follow 5-1-1 or 4-1-1. It adds that these rules can mean arriving earlier than you’d like, especially with a first baby.

The NHS page on the signs of labor doesn’t use the name at all. It tells you to call your midwife or maternity unit once regular contractions come every 5 minutes or more often.

Why the numbers point to active labor

Rules like this aim to show when you’re probably in active labor. Boston Medical Center describes its 4-1-1 rule exactly that way. Before active labor comes early labor, which can be long. Scripps Health says early labor generally lasts 6 to 12 hours, and 24 hours or longer is also normal. It describes mild contractions every 5 to 15 minutes at first, which then come more often and last longer. Typical values for each stage are in how long contractions last.

True labor contractions settle into a pattern and get closer together and stronger over time. ACOG says each one lasts about 60 to 90 seconds. Spacing alone can mislead you, though. Cleveland Clinic notes that prodromal labor, sometimes called false labor, can bring contractions every five minutes, 60 seconds each. It describes true labor as contractions less than five minutes apart, each longer than one minute, for over an hour. So the hour in 5-1-1 matters as much as the five minutes.

ACOG adds a simple check: if rest and drinking water make the contractions go away, they’re not true labor contractions. Sometimes, ACOG says, only a cervical exam can tell the difference. Our guides to prodromal labor and Braxton Hicks contractions explain both kinds of false labor in more detail.

4-1-1, 3-2-1 and other versions of the rule

Hospitals don’t all use the same numbers, and several set an earlier cutoff for second and later babies. Those labors tend to be shorter. ACOG puts a typical first labor at 12 to 18 hours and a later one at 8 to 10. Some examples:

Source	First baby	Second or later baby
MetroHealth, Cleveland	5-1-1	No separate rule given
Boston Medical Center	4-1-1: a contraction at least every 4 minutes, about 1 minute long, nonstop for at least 1 hour	Come in when contractions are 5 to 6 minutes apart
Scripps Health, San Diego	3-2-1: 3 minutes apart for about 2 hours, 1 minute each, and you can’t talk or walk through them	4-1-1 or 5-1-1, and you can’t talk or walk through them
NHS, UK	Call your midwife or maternity unit when regular contractions come every 5 minutes or more often	No separate rule given

Scripps Health’s 3-2-1 sets the latest threshold in this table. Use it only if your own provider recommends it. You may also come across a 3-1-1 or a 5-5-1 rule online. We could not find either one in hospital or professional guidance, so if someone gives you those numbers, ask exactly what they mean.

Follow the numbers your own provider gives you. Ask at a prenatal visit and write them down.

How to check the 5-1-1 rule with a timer

1. Start timing when contractions come one after another and you can’t talk or laugh through them, which is Boston Medical Center’s cue.
2. Mark the start and the end of each contraction, with a timer or on the printable log in our contraction chart. The interval runs from one start to the next, the duration from start to end.
3. Look at the whole last hour. Have the contractions stayed about 5 minutes apart and about 1 minute long throughout? One short gap doesn’t settle anything.
4. Notice whether they keep going when you rest or drink water. Boston Medical Center says contractions that slow or stop with rest, water or a walk are likely not active labor yet.
5. When the pattern holds, call your hospital and give them the numbers.

Keeping track of all that during contractions is hard. The free online timer here shows how close you are to 5-1-1 and keeps your data in your browser. The Contraction Timer app has 5-1-1 and 4-1-1 built in, and you can enter your hospital’s own values. It alerts you when your rule is reached, and how the app calculates describes how that check works. More timing tips are in how to time contractions.

When not to wait for 5-1-1

Some reasons to go in come before the pattern does. MetroHealth asks patients to come to its birthing center before 5-1-1 if they:

• vomit during contractions
• feel pressure in the rectum
• have contractions that make it impossible to walk or talk

MetroHealth’s list also includes vaginal bleeding, fluid from the vagina and a baby moving less than normal. If your provider has given you other instructions, MetroHealth says to follow those first.

The rule also leaves out things that change the timing for you, such as a second baby or a long drive to the hospital. Our guide on when to go to the hospital in labor covers the whole decision. It also lists what the labor ward will want to know when you call.