There is a particular tone in some antenatal preparation that suggests labour, with the right breathing and the right mindset, will be challenging but manageable without medication. For some women, this is true. For others, labour pain is genuinely among the most intense pain medicine sees, and being unprepared for that — or carrying the idea that needing pain relief is a failure of resolve — makes the whole experience worse.
A better starting point: labour hurts, the amount it hurts varies a lot between women and even between births for the same woman, and effective pain relief is part of normal NHS maternity care. Choose what fits, and feel free to change your mind once labour is actually under way. Most birth plans get rewritten on the day.
Healthbooq (healthbooq.com) covers birth preparation and labour. For the bigger picture, see our complete guide to parenting.
What Labour Pain Actually Is
Labour pain has two distinct flavours.
First stage (cervix dilating from closed to fully open, which takes most of the labour). The pain comes in waves with each contraction, builds and recedes, and is felt as a deep, cramping, diffuse pain low in the belly, the back, and sometimes radiating down the thighs. Between contractions in early labour there is often little or no pain at all. Most women describe each contraction lasting 45–90 seconds at peak labour, with a few minutes of relative quiet between.
Second stage (pushing the baby out). The pain shifts — sharper, more localised in the perineum and vagina, accompanied by an extremely strong urge to push that for many women overrides everything else. This stage is much shorter (typically 30 minutes to a couple of hours) and the pain often shifts in quality so completely that some women experience the pushing stage as the easier part.
The intermittent nature of contractions is what makes non-pharmacological techniques work at all. You don't need to manage pain that lasts 90 seconds — you need to manage one contraction at a time, with rest in between.
What Each Option Actually Does
The options below are listed roughly in order from least to most pharmacologically active. There is no implied "right" order to try them — many women go straight to an epidural and are very glad they did.
Breathing, Movement, and Position
Structured breathing — slow in, slower out, focused — does several useful things. It keeps oxygen flowing to a working uterus, dampens the adrenaline-and-cortisol surge that amplifies pain, and gives the labouring woman something concrete to do during a contraction. It does not eliminate pain. For some women in early labour, it makes the difference between managing and not.
Movement matters more than most birth books emphasise. Lying on your back is the worst position for both pain and progress: it compresses the great vessels, intensifies back pain, and reduces the efficiency of contractions. Walking, leaning forward against a wall or birth ball, kneeling on all fours, sitting astride a chair backwards with arms over the back — all are actively useful. Some women labour standing up the entire time. NHS labour wards expect this; staying mobile in early labour is encouraged.
A good birth partner doing firm counter-pressure on the lower back during contractions reduces back pain meaningfully. Worth practising in advance — pressing in the right place with the right firmness is a skill, and it's much easier to learn before the moment.
Water (Bath, Shower, Birth Pool)
Submerging in warm water during labour reduces pain reliably enough that the Cochrane review (Cluett et al.) found it significantly cuts epidural use in first-stage labour. The mechanisms are partly the warmth, partly the buoyancy reducing pressure on the pelvis, and partly the calmer environment. A deep bath at home in early labour can be transformative; a birthing pool in a midwife-led unit can carry many women all the way through.
Water birth (delivering in the pool) is offered in most NHS midwife-led units and some obstetric units, but it is restricted to low-risk, uncomplicated pregnancies. Conditions like a previous caesarean, gestational diabetes on insulin, pre-eclampsia, or a baby measuring small or large will usually move you to a regular labour room.
If your unit has pools, ask in advance how many they have and what happens if all are in use — supply does not always meet demand on a busy night.
TENS Machine
A small battery-powered device delivering tingling electrical pulses through pads stuck to your lower back. The "gate control" theory of pain explains the mechanism: the sensory stimulation crowds out some of the pain signalling at the spinal cord level. The evidence base is modest but consistent — many women find it helpful in early labour and less so once contractions become severe.
A few practical points:
- Start it early. TENS works better when you build it up before the pain is intense.
- You can use it at home. Pharmacies (Boots in particular) hire labour-specific TENS machines from around 37 weeks for around £20–30.
- It is not allowed in water. You'll need to swap to something else if you get in the pool.
- It has no side effects for you or the baby.
For some women, it's the difference between coping at home for an extra few hours and arriving at the unit too early.
Gas and Air (Entonox)
Entonox is a 50/50 mix of nitrous oxide and oxygen, breathed through a mouthpiece you hold yourself. It is the workhorse of UK labour pain relief — available in every birth setting, including home births, with no anaesthetist required.
Two key practicalities:
- Start at the beginning of the contraction, not when it peaks. Entonox takes 20–30 seconds to act. If you wait until you're in pain, the gas hits as the contraction is fading and you've missed the window.
- Breathe slowly and deeply. Hyperventilating tips you over from "useful relief" into "lightheaded and queasy" rapidly.
It does not eliminate pain — it changes how you experience it. Many women describe a sense of being slightly removed from the contraction rather than fully inside it. Side effects (dizziness, nausea, dry mouth) clear within minutes of stopping. It has no effect on the baby. It is not enough for everyone in active labour, and that's a reasonable reason to step up to something stronger.
Opioids: Pethidine, Diamorphine, Meptazinol
A single intramuscular injection of an opioid is offered in most UK units — pethidine in many, diamorphine in others, meptazinol in some. They take 15–20 minutes to act and last 2–4 hours.
What they do well: take the edge off and, more importantly, allow some women to rest or even sleep through a long latent phase, which can change the trajectory of an exhausting labour.
What they do badly: they do not provide deep pain relief — most women still feel contractions clearly. Side effects include drowsiness, nausea (so they're usually given with an anti-emetic), and itchiness.
The important caveat is the baby. Opioids cross the placenta. Given within roughly 2–4 hours of delivery, they can cause respiratory depression in the newborn — the baby is born sleepy and may need help with breathing or a dose of naloxone (the reversal drug, which all delivery suites keep on hand). They can also dampen the early feeding instinct in the first hour after birth. The midwife will balance this when deciding timing.
Diamorphine has a slightly cleaner profile than pethidine on most measures and is becoming the default in many UK units; meptazinol is intermediate.
Remifentanil PCA
Remifentanil is an intravenous opioid given through a button you press yourself (patient-controlled analgesia). It has a remarkably short half-life — 3–5 minutes — which means each dose works fast and clears fast, so you can time it to contractions and the drug doesn't build up in you or the baby.
It is more effective than pethidine and causes less neonatal respiratory depression. It is less effective than an epidural. The trade-off is monitoring: remifentanil can cause maternal apnoea (you stop breathing momentarily) at effective doses, so it requires one-to-one midwifery care, an IV cannula, and continuous oxygen saturation monitoring with oxygen on standby.
Availability varies. Some units offer it routinely; many don't. If it matters to you, ask in advance.
Epidural
The most effective form of pain relief available in labour, and by a large margin. An anaesthetist places a thin catheter into the epidural space in your lower back, through which local anaesthetic and a small amount of opioid is delivered continuously and topped up as needed. The Cochrane review (Anim-Somuah et al., updated 2018) is unambiguous: pain scores fall by 80–90% in most women within 20–30 minutes of insertion.
What it involves practically:
- An IV line first, fluids running.
- Sit forward or lie on your side with your back curled. The anaesthetist injects local anaesthetic, then places the epidural needle and threads the catheter. Most women report this taking 15–30 minutes from request to working analgesia.
- A continuous infusion runs after that, with patient-controlled top-ups available in many units.
- You'll have a urinary catheter (because you can't feel your bladder) and continuous fetal monitoring.
The honest trade-offs:
- Longer second stage of labour by an average of around 15 minutes.
- Higher chance of an instrumental delivery (forceps or ventouse) — partly because reduced pelvic floor sensation makes pushing less effective.
- Lower mobility. "Mobile" or low-dose epidurals leave more sensation, but most women still need help moving in bed and cannot walk.
- Maternal fever in around 15–20% — usually mild, but occasionally triggers an investigation for infection in the baby after birth.
- Postdural puncture headache in around 1% — a positional severe headache in the days after, treated effectively with a "blood patch" (a small injection of your own blood at the puncture site).
- Failure or patchy block in a small percentage; sometimes resited.
- Does NOT increase the caesarean rate. This is a persistent myth that the trial evidence has consistently disproven.
A combined spinal-epidural (CSE) gives faster onset (the spinal works in minutes) plus the long-term control of the epidural catheter. It's increasingly common.
Epidurals are not available at home births or in most freestanding midwife-led units — choosing one of those settings means committing to the non-epidural options or accepting a transfer to an obstetric unit if you change your mind. Transfer is not unusual and units handle it routinely.
A Few Things Worth Knowing in Advance
- You can have more than one. TENS plus gas and air. Pethidine then, later, an epidural. Pool then epidural after transfer. Most women use a combination.
- You can change your mind. A birth plan is a preference, not a contract. The midwife will not be disappointed in you for asking for an epidural. They have seen this many times.
- Timing of an epidural matters less than people used to think. The old rule that "you can't have an epidural after 7cm" is largely outdated — the limit is anaesthetist availability and how rapidly things are progressing, not a fixed cervical measurement. If you want one, ask. They'll tell you if it's not feasible.
- Some labours move too fast for some options. A precipitate labour (a few hours start to finish) sometimes outpaces an epidural. Gas and air and water tend to remain available regardless.
- Pre-existing back problems, scoliosis, or low platelets can affect epidural feasibility. Worth raising at the antenatal anaesthetic review (your midwife can refer you if you want to talk to an anaesthetist before the day).
- A C-section requires an anaesthetic regardless — usually a spinal, sometimes a top-up of an existing epidural, occasionally a general. The pain relief decisions for a planned or category-2 section are different from labour analgesia and your obstetric and anaesthetic team will walk you through them.
So Which Should You Choose?
There is no right answer. The evidence-based, sensible answer is: have a plan, hold it loosely, and be willing to escalate.
A reasonable default for many women: TENS + mobility + breathing in early labour at home, water if available once contractions are established, gas and air on top, and an epidural if pain becomes overwhelming or labour stalls. Many never get past the gas and air. Many ask for the epidural the moment they walk in. Both are entirely reasonable.
The one piece of advice that comes up reliably from women looking back on their own labour: ask sooner than you think you need to. Pethidine takes 20 minutes to work; an epidural takes 30 minutes from request to working. If you're suffering and considering it, that consideration is the signal.
Key Takeaways
Labour pain ranges from manageable to genuinely severe, and choosing pain relief in advance — and being free to change your mind in the moment — is sensible preparation, not a failure of nerve. The realistic options in the UK ladder roughly in order of effectiveness: breathing and movement, water immersion, TENS, gas and air, pethidine or diamorphine, remifentanil PCA (where available), and epidural. Epidural is the most effective by a clear margin, cutting pain scores by 80–90%, but trades off longer labour, higher chance of an instrumental birth, and a small risk of postdural puncture headache. Most women use a combination, and most change plans during labour itself. There is no universal best option — only the best one for you in the moment, in your unit, with your labour.
