Signs of Labor: How to Actually Know It's Time
Key takeaways
- Four main signs labour may be starting: regular contractions, a "show" (mucus plug), waters breaking, and lower back pressure.
- Real contractions get longer, stronger, and more frequent over time — Braxton Hicks don't build up the same way.
- Call your midwife or maternity unit when contractions come every 5 minutes or less, or sooner if anything feels seriously wrong.
- Around 1 in 3 labours are medically induced, meaning many people never experience this stage of wondering at all.
- Waters breaking, heavy bleeding, or reduced baby movement are always reasons to call straight away, regardless of contractions.
I can’t tell you what it’s actually like to wonder whether labour has started, because I never had to. Our daughter’s birth began with a phone call from our doctor recommending induction, not a contraction I had to puzzle over at 2 AM. I’ve written about that fuller story separately, but it means this particular piece leans more on research than my own experience — which, if anything, might make it more useful, since I’m not projecting my own path onto what’s actually a fairly well-defined set of signs.
The four signs that actually matter
According to the NHS’s own guide to signs labour has begun, there are four things to watch for, and none of them require guesswork once you know what to look for:
Contractions. Tightenings across your belly that start out mild and irregular and gradually become longer, stronger, and closer together. This progression — building rather than staying flat — is the key difference from practice contractions.
A “show.” The mucus plug that’s sealed your cervix throughout pregnancy comes away, sometimes tinged with a little blood. It can happen hours or even days before labour properly starts, so it’s a sign to watch, not necessarily an immediate one.
Waters breaking. The amniotic sac ruptures, which can be a sudden gush or a slow trickle. This one deserves a direct call to your maternity unit regardless of whether contractions have started yet.
Backache or pelvic pressure. Some people feel labour starting as a persistent lower back ache or a feeling of pressure from the baby’s head, rather than contractions up front.
How to tell it’s not just Braxton Hicks
The honest answer is that real labour contractions behave differently over time, not just in how they feel in a single moment. The NHS is direct about this: real contractions get longer, stronger, and more frequent as labour goes on, while Braxton Hicks — the practice contractions many people feel from the third trimester onward — stay irregular, don’t intensify, and tend to ease off if you change position or rest. If you’re not sure which you’re feeling, timing them for an hour tells you more than trying to judge the intensity alone.
When to actually call
This is the part worth being precise about, because “trust your instincts” isn’t quite enough on its own. Call your midwife or maternity unit once contractions are coming every 5 minutes or more often. Call straight away, regardless of contractions, if your waters break, if you notice any vaginal bleeding, if your baby is moving less than usual, or if you think labour might be starting before 37 weeks. If you feel a strong, sudden urge to push and think birth is imminent, that’s a call for emergency help, not a wait-and-see moment.
What if you’re being induced instead
It’s worth saying plainly: a large share of pregnancies never go through this stage of wondering at all. Around 1 in 3 labours are medically induced, for reasons ranging from being overdue to a diagnosed condition — ours was intrahepatic cholestasis of pregnancy, which meant our doctors made the call on timing rather than our bodies. If that ends up being your path too, everything above still matters to understand, but the actual moment your labour “starts” will look more like a scheduled admission than a middle-of-the-night guessing game.
What I wish I’d understood
I wish I’d known, before any of this, how normal it is not to experience the version of labour’s start that gets described most often. So much writing about this topic assumes a spontaneous, at-home beginning, and if your own path is different — induced, scheduled, or medically directed — that doesn’t mean you missed something or did anything wrong. It just means your particular pregnancy needed a different door into the same room.
Frequently asked questions
How do I know if it’s real labour or Braxton Hicks?
Real labour contractions get progressively longer, stronger, and closer together over time. Braxton Hicks stay irregular and often ease off with rest or a change in position. Timing them for an hour is more reliable than judging by feel alone.
What does a “show” actually look like?
It’s the mucus plug that’s sealed your cervix, which can come away as a small amount of thick discharge, sometimes with a streak of blood. It can happen well before contractions start.
Do my waters have to break in a dramatic gush?
No — it’s sometimes a sudden gush, but just as often a slow, steady trickle. Either way, call your maternity unit once it happens, regardless of whether contractions have started.
When exactly should I call the hospital?
Once contractions are coming every 5 minutes or more often. Call immediately, regardless of contraction timing, if your waters break, you notice bleeding, your baby’s movements have reduced, or you’re under 37 weeks and think labour is starting.
Is it normal to never experience these signs at all?
Yes — a substantial share of births are induced, where your care team decides the timing rather than your body signalling it spontaneously. It’s a different path to the same outcome, not a shortcut or something missing.
References
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