Wavesong

Answers

When to go to the hospital

Two ways this goes wrong, and they are not the same mistake. Arriving too late is the one every story is about. Being sent home from triage is the quieter one, and it is not a failure. The call comes before the car.

When should I go to the hospital in labor?

You go when the rule your own provider gave you is met, and the call goes first. The shape many providers give is 5-1-1: contractions every 5 minutes or less, each lasting 1 minute or more, holding for 1 full hour. Some providers give 4-1-1, some give something else because of your distance or your last birth. Whatever you were handed at your last appointment beats this page. ACOG says to call your ob-gyn or other provider if you think you are in labor or you are not sure.

A shorter list waits for no rule and no hour. ACOG says to go to the hospital if your water breaks and you are not having contractions, if you are bleeding heavily, if you have constant severe pain with no relief between contractions, or if your baby is moving less than usual. The NHS adds calling urgently under 37 weeks, or at 6 or more contractions every 10 minutes.

The call comes before the car

The person on the other end of that phone holds the parts you cannot see: your pregnancy, your history, how far out you live, what they want before they hold a bed. You will be asked how far apart the contractions are, how long each lasts, how long this has gone on, whether your water broke, whether there is bleeding, and whether the baby has been moving as usual. Having those numbers in front of you is most of what makes the call quick.

Before you hold yourself to it too strictly: none of the primary sources use the words 5-1-1. The closest is MedlinePlus, which says to contact your provider right away for regular painful contractions every 5 to 10 minutes for 60 minutes. 5-1-1 is a rule providers hand out, not a published standard. The one you were given personally matters more than the one you read.

Two mistakes, and they are not the same size

Going too late

The one every birth story is about. What makes it likelier is a pattern nobody was measuring, a long drive started at four minute gaps, or a second baby expected to give as much warning as the first. The short list that gets a call straight away exists so this one never waits on an hour.

Going too early

The quieter one, and it is not a disaster. You go in, you are checked, things have not moved far enough, and you are sent home to carry on somewhere more comfortable. It costs a drive and some morale. It does not mean you were wrong to check.

Labor takes longer than it feels at 2 a.m.

ACOG puts numbers on the length of it. For a woman having her first baby, labor typically lasts 12 to 18 hours. For women who have given birth before, it typically lasts 8 to 10 hours. An average is not a forecast of your labor, but it is calibration. If this started ninety minutes ago and the contractions still wander, you are early in something long rather than late for something short.

The latent phase, and why triage sends people home

The NHS calls the first part of the first stage the latent phase. The cervix softens, thins and starts to open, the contractions can be irregular, and the NHS says plainly that there is no set pattern. It also says this is usually the longest stage of labour.

Established labour, by the NHS's own definition, is the cervix dilated to about 4cm, with contractions stronger and more regular. That one number is what triage measures you against. Nothing failed. Somebody measured how far the latent phase had got, and it had not got to 4cm yet.

It is also the honest limit of every contraction timer, this one included. A timer measures the pattern from outside: how long each contraction lasts, how far apart they arrive, how long that has held. It cannot see a cervix and it cannot tell you that you are in labor. It can hand you accurate numbers.

How far away you are is part of the answer

Your rule is about the pattern. The drive is about geography, and your provider folds it in only if you mention it. Thirty minutes of empty motorway at 3 a.m. is not thirty minutes across a city on a Tuesday. If the unit is far, that belongs on the call. Two things are worth settling while nothing is happening: who drives, and which entrance you use at night, because for many units it is not the one you saw on the tour.

How Wavesong helps you see the pattern

The contraction timer on this site is free, needs no account, and measures all three parts of your rule separately with their real numbers beside them: how often they come, how long each lasts, and how long the pattern has actually held. That third part is the one that gets left out. yourduedate.com fires its 5-1-1 message on 4 contractions, about fifteen minutes of data, and mycontractiontimer.com goes critical on 3, about seven minutes. Neither checks the hour, and the hour is what decides whether four strong contractions are a reason to pick up the phone or just four strong contractions.

Open the contraction timerWhat the 5-1-1 rule asks for

It never says you are in labor. It shows the pattern you timed against the rule you were given, so you have something real to read out on the call.

Wavesong is not a medical device and does not give medical advice. There are no clinicians on this team and no page here is reviewed by a doctor. Every clinical figure links to a primary source you can open yourself.

Call your provider or your maternity unit now, before any rule and before any timer, if your water breaks, if you are bleeding, if you have constant severe pain with no relief between contractions, if your baby is moving less than usual, or if you are under 37 weeks and think you might be in labor. The first four are on ACOG's own list of reasons to go in, and ACOG defines preterm labor as labor that starts before 37 weeks of pregnancy and says it needs medical attention right away.

Where this comes from

Questions about when to go

When do I actually go, and who decides?

No single number settles it. The rule you were given is the answer, most often 5-1-1, and its three parts have to be true at once. Above it sits the list that jumps the queue: waters breaking, bleeding, constant severe pain with no relief, the baby moving less, under 37 weeks. ACOG says to call your ob-gyn or other provider if you are not sure.

Will they send me home?

Possibly, and it is not a failure. The NHS defines established labour as the cervix dilated to about 4cm, and the latent phase before it is usually the longest stage. Not being there yet is why units send people home. It is worth asking what they want you to come back on.

What happens in triage?

It varies by unit, so this is a shape and not a script. You are checked in, usually monitored for a stretch, and examined to see how far things have got. Then you are either admitted or sent home with a clearer rule.

It is my second baby. Do I go earlier?

ACOG's figures are 12 to 18 hours for a first baby and 8 to 10 hours for women who have given birth before, so a later labor does tend to be shorter. That is an average, not a promise about yours. Whether it changes what your provider wants from you is worth raising on the call.

Should I drive, or call an ambulance?

That is a question for your provider or your maternity unit, and one of the better reasons to call before you leave rather than from the car. The urgent list waits for no pattern: waters breaking, bleeding, constant severe pain with no relief, the baby moving less, under 37 weeks.

They are 5 minutes apart but it has only been half an hour. Is it time to go?

The gap is one of three things your rule asks for. 5-1-1 also wants a minute of contraction and the pattern holding a full hour. It may well become the hour, and then you will have it measured instead of estimated. If you are worried before then, that is its own reason to call.

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Last checked 2026-08-24