What Contractions Feel Like

The physical event

Strip away the language and a contraction is a muscle doing one thing. The NHS: "When you have a contraction, your womb tightens and then relaxes." The HSE uses almost identical words. Both then give the same practical test, which is the most useful sentence on either page: "If you put your hand on your abdomen, you'll feel it getting harder. When the muscles relax, the pain fades and you'll feel the hardness ease."

That hardening is what makes a contraction identifiable rather than just abdominal pain. Trapped wind, constipation and ligament pain do not turn your bump rigid under your palm. A contraction does, every time, and the hardness arrives and leaves with the pain.

What the tightening is doing has a purpose worth knowing: the HSE explains that "the contractions are moving your baby down and opening the entrance to your womb (the cervix)".

What it feels like, in the words used by national guidance

The NHS and HSE both settle on the same comparison: "For some people, contractions may feel like extreme period pains." Note the hedge — for some people. It is a useful description and not a universal one.

ACOG describes the location rather than the intensity: "As your uterus contracts, you may feel pain in your back or pelvis. This pain may be similar to menstrual cramps."

Tommy's publishes a first-person account that captures the shape better than any clinical description does. Catherine: "For me, early labour felt like mild period pains, aching in my tummy and lower back that would come and then disappear again. The pain increased in frequency for a few hours and then the intensity increased rather suddenly, which wasn't what I expected. I thought it would be more gradual."

That last line is the part most people are unprepared for. The build is often not smooth.

Where you feel it

Not everyone feels contractions in the front. Tommy's is explicit: "For some people contractions may feel like extreme period pains. Others get backache instead of, or as well as, pain in the front of their bump."

ACOG offers a rule of thumb for telling the two kinds of tightening apart by location: "Pain from true labor contractions usually starts in the back and moves to the front. Pain from false contractions usually is felt only in the front."

Tommy's also lists a sensation that gets misread as needing the toilet: "A sense of pressure in your pelvis and a feeling that you want to wee or poo. This is caused by your baby's head moving down." The NHS lists the same thing among the signs of labour — "an urge to go to the toilet, which is caused by your baby's head pressing on your bowel".

How the sensation changes

The direction of travel is the diagnostic bit. The NHS: "Your contractions tend to become longer, stronger and more frequent as your labour progresses." Tommy's spells out the early messiness: "At first, these contractions may stop and start and vary in frequency, strength and length. You may get lots of regular contractions and then they may slow down or stop."

NICE's intrapartum guideline builds that unpredictability into its definition. The latent first stage is "a period of time, not necessarily continuous, when there are contractions and there is some cervical change". Stopping and restarting is written into the official description of early labour. It is not a sign that something has gone wrong.

Established labour, by NICE's definition, is when "there are regular contractions and there is progressive cervical dilatation from 4 cm". Only the second half of that can be measured from outside, which is why nobody can tell you over the phone how far along you are.

The tightenings that are not labour

The NHS describes practice contractions: "These tightenings are called Braxton Hicks contractions, which may feel uncomfortable, but are usually painless. Braxton Hicks contractions generally do not last that long, do not happen very frequently and do not build up."

Tommy's lists them as "often painless, irregular, short". ACOG is franker about how convincing they can be: "These 'practice' contractions can be very painful and can make you think you are in labour when you are not." It gives one test you can run at home: "Time your contractions and note whether they continue when you are resting and drinking water. If rest and hydration make the contractions go away, they are not true labor contractions."

ACOG also concedes the limit of all of this: "sometimes the only way to tell the difference is by having a vaginal exam to find changes in your cervix that signal the start of labor." If you cannot tell, that is not a failure of attention.

What the sensation cannot tell you

It cannot tell you how long you have left. Strong, painful contractions can accompany a cervix that has barely changed — NICE instructs staff to "recognise that a woman may experience painful contractions without cervical change" and to offer support and pain relief anyway. Mild-feeling contractions can accompany faster progress. Intensity is not a clock.

When to call someone

• Your midwife or maternity unit when contractions are regular, strong, lasting at least 60 seconds and coming every 5 minutes (HSE, Tommy's). The NHS asks you to call for guidance once contractions come every 5 minutes or more often.
• Urgently if your waters break, you have vaginal bleeding, your baby is moving less than usual, you are under 37 weeks and think you might be in labour, any contraction lasts longer than 2 minutes, or you are having 6 or more contractions every 10 minutes. The NHS is explicit: "Do not wait until the next day — call immediately, even if it's the middle of the night."
• Your local emergency number — 999 in the UK and Ireland, 911 in the US and Canada, 000 in Australia, 111 in New Zealand — if you think your baby is coming now and you have a strong urge to push.

The short version

A contraction tightens the womb, hardens your bump under your hand, peaks and fades. Most people compare it to severe period pain; a good number feel it mainly in their back. The pattern matters more than the feeling: longer, stronger and closer together is labour, and tightenings that fade with rest and a drink usually are not.