ParentAIIf your baby's sleep feels unpredictable, you are not doing anything wrong. Babies under one are not built to sleep the way adults do, and most families spend the first year adjusting to a pattern that keeps changing. The good news is that a few consistent habits make a real difference, both to how easily your baby settles and to how much rest you get.
Why this happens at this age
Newborns sleep in short stretches around the clock because their stomachs are small and their body clocks are not yet set. The internal rhythm that tells us night from day only starts to organise itself at around 8 to 12 weeks, and it develops gradually after that. Somewhere around 4 months, sleep itself changes: babies start cycling through lighter and deeper stages the way older children do, which is why many parents notice more night waking at this point even though their baby was settling well before. This is a sign of maturing, not a step backwards.
Night waking stays normal well past six months. Many babies still need one or more feeds overnight in the second half of the first year, and brief waking between sleep cycles is universal. What changes over the year is not whether your baby wakes, but how easily they can go back to sleep.
What helps
Keep a short, predictable bedtime routine. The same three or four steps in the same order, every evening, become a signal that sleep is coming. It does not need to be long: a warm bath or a wipe-down, a feed, a short book or a quiet song, and into the sleep space. Twenty to thirty minutes is plenty. If you say the same phrase each night as you lay your baby down, such as "Goodnight, time to sleep," that phrase starts to do some of the settling for you.
Make daytime bright and night-time boring. During the day, open the curtains, talk and play, and let ordinary household noise carry on. At night, keep the lights low, speak softly, and keep feeds and nappy changes as uneventful as you can. This contrast is one of the main ways a baby's body clock learns the difference.
Watch for tired signs and the gap between sleeps. Overtired babies find it harder to settle, not easier. In the early months many babies can only manage about an hour to ninety minutes awake before they need to sleep again; by the end of the first year that stretches to three or four hours. Rubbing eyes, staring into the distance, turning away, and a particular fretful cry are common early cues. Starting the wind-down when you first see them is usually easier than waiting for full crying.
Try laying your baby down drowsy but still awake. From a few months old, a baby who falls asleep in the same place they will wake up learns to recognise that place as safe. If your baby is used to falling asleep in your arms or while feeding, you can shift gradually: put them down slightly more awake each night over a week or two, and stay close with a hand on their chest or a gentle shush if they protest. Some nights this will not work, and that is fine.
Keep the sleep space the same for naps and nights where you can. A familiar cot or bassinet, the same darkened room, and the same white noise or quiet all help sleep associations form. Naps in the pram or car are a normal part of family life and do not undo this.
Look after your own sleep too. Take turns with a partner or another adult if you can, sleep when the baby sleeps at least some of the time, and accept help with everything that is not feeding or settling. A rested parent settles a baby more calmly, and your baby picks up on that.
Safe sleep, every sleep
Whatever routine you build, the sleep space itself matters most. The guidance below is shared by paediatric bodies worldwide:
- Always place your baby on their back to sleep, for naps and at night, until their first birthday.
- Use a firm, flat sleep surface with a fitted sheet and nothing else in it: no pillows, bumpers, loose blankets, or soft toys.
- Keep your baby in your room, in their own cot or bassinet, ideally for the first six months and up to a year.
- Keep the room comfortably cool and do not let your baby overheat. A sleep bag or wearable blanket is safer than loose bedding.
- Do not sleep with your baby on a sofa or armchair, and avoid bed-sharing, particularly if anyone has been drinking, smoking, or taking medication that causes drowsiness.
- Keep the home smoke-free.
What to avoid
Rushing in at the first sound. Babies are noisy sleepers. Grunts, sighs, and short whimpers often pass on their own. Pausing for a moment to see whether your baby is actually awake gives them the chance to resettle, and avoids waking a baby who was only moving between sleep cycles.
Building a routine that depends on something you cannot always provide. If the only way your baby can fall asleep is a long car ride or forty minutes of rocking, every evening becomes a performance. Aim for steps you can repeat on a tired Tuesday as well as a calm weekend.
Expecting the routine to fix everything at once. Teething, illness, a growth spurt, learning to roll or crawl, and simply being four months old all disrupt sleep. A good routine does not prevent these; it gives you something steady to return to once they pass.
Comparing your baby to others. The range of normal is wide. Some babies sleep six-hour stretches at three months; others still wake several times at ten months, and both can be perfectly healthy.
When to seek help
Talk to your paediatrician, health visitor, or family doctor if:
- your baby's breathing during sleep sounds laboured, they snore regularly, or you notice pauses in breathing;
- your baby is very hard to wake, unusually sleepy during the day, or feeding poorly and not gaining weight as expected;
- your baby seems in pain or distress at night that does not settle with comfort and feeding;
- sleep has suddenly changed and your baby also has a fever, a rash, vomiting, or seems unwell;
- you feel persistently low, anxious, or unable to cope. Exhaustion in the first year is common, but if it starts to feel like more than tiredness, that deserves attention in its own right.
If you want to try a more structured approach to night settling once your baby is over about six months, discuss it with your healthcare provider first, and choose a method you feel comfortable staying consistent with.
Sources
- American Academy of Pediatrics, "Sleep-Related Infant Deaths: Updated 2022 Recommendations for Reducing Infant Deaths in the Sleep Environment" (policy statement, Pediatrics, 2022)
- NHS (UK), "Helping your baby to sleep"
- National Institute of Child Health and Human Development (NICHD), Safe to Sleep campaign: "Ways to Reduce Baby's Risk"
- The Lullaby Trust, "Safer sleep for babies"