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Baby sleep from 0 to 6 months: what the evidence says

Night wakings in a baby are not a malfunction: cohort data describe them as the norm of the first months, with wide variation between babies. Official benchmarks go from 14 to 17 hours of sleep per 24 hours at the start to 12 to 16 hours from 4 months, naps included (WHO, 2019). Safe sleep rests on recommendations that have stayed stable for decades (AAP, 2022; NHS, 2025).

What the first months actually look like

Newborns do not yet distinguish day from night: sleep is spread across the 24-hour day, and a day-night rhythm typically develops between 3 and 6 months (Frontiers in Neuroscience, 2025). International guidance puts the need at 14 to 17 hours of sleep per 24 hours from 0 to 3 months, then 12 to 16 hours from 4 to 11 months, naps included (WHO, 2019).

Cohort data trace the same curve. A systematic review of 34 studies found pooled averages of about 14.6 hours of sleep per 24 hours at 0 to 2 months, 13.6 hours from 3 months and 12.9 hours from 6 months, a decline of roughly 10 minutes per month between 1 and 6 months (Galland et al., Sleep Medicine Reviews, 2012). The spread around those averages is wide: at 0 to 2 months, reported bounds ran from about 9 to 20 hours across studies (same source).

Night wakings are the rule. In parent-diary studies, their number falls from about 3 per night at birth to about 2 by 16 weeks, with little change through 24 weeks; actigraphy, which also detects brief wakings parents never notice, reports higher counts in some studies, and no diary study reported more than 5 wakings per night (Frontiers in Neuroscience, 2025, a review of 35 studies). An earlier systematic review recorded 0 to 3.4 wakings per night at 0 to 2 months (Galland et al., 2012). The longest uninterrupted sleep stretch lengthens with age: about 2.5 hours until 10 weeks, then 4 to 6.5 hours at 24 weeks depending on how it is measured (Frontiers in Neuroscience, 2025).

What is normal, and what needs a second look

Waking at night is expected. Newborns invariably wake up repeatedly in the night for the first few months, and disturbed nights can be very hard to cope with (NHS, 2025). Sleep structure also differs from adults: babies do not have regular sleep cycles until about 6 months of age, and it is normal for a 6-month-old to wake up during the night and go back to sleep after a few minutes (AAP, 2026).

What calls for a consultation is not a wake count but the overall picture. The NHS says to speak to your health visitor if sleep is a problem or you want advice, and to seek help quickly if you are worried your baby might be ill (NHS, 2025). Exhaustion counts too: if you have a partner, ask them to help with feeds, and if you are on your own, ask a friend or relative to stay so you can get some sleep (NHS, 2025).

Some signs are not about sleep rhythm at all, but need immediate assessment: a baby who will not wake up, is struggling for breath, or becomes limp or floppy and is not responding as usual (NHS, 2025). Official guidance sets no threshold number of wakings for seeking help, because the variation between babies is too wide for such a number to mean anything (Frontiers in Neuroscience, 2025; NHS, 2025).

Safe sleep: what is established

Back to sleep, flat, for every sleep: this is the longest-standing recommendation, and the one with the most behind it. The AAP's 2022 policy statement groups supine positioning, a firm, flat, non-inclined sleep surface, room sharing without bed sharing, and avoidance of soft bedding and overheating (AAP, 2022). Its consumer guidance is blunt: babies who sleep on their backs are much less likely to die suddenly and unexpectedly, and the side position is as dangerous as the stomach position (AAP, 2026).

A safe cot is an empty cot. Use a crib, bassinet or play yard with a firm, flat mattress and a fitted sheet, and keep loose blankets, pillows, stuffed toys and bumpers out of the sleep space (AAP, 2022; AAP, 2026). NHS advice is to avoid cot bumpers, pillows and loose bedding, to keep the mattress firm, flat and waterproof, and to keep the room at about 16 to 20 °C (NHS, 2025).

And share the room, not the bed. The safest place for a baby to sleep for the first 6 months is in a cot, on their back, in the same room as you (NHS, 2025); room sharing can cut the risk of SIDS by as much as half, and the AAP recommends it for at least the first 6 months (AAP, 2026). Never fall asleep with a baby on a sofa or armchair, where the risk is significantly higher (Lullaby Trust, 2025; NHS, 2025).

What the data do not support

Three common fixes do not survive contact with the evidence. The first is using the stomach position, or propping a baby on their side, to get them to settle: the guidance is uniform that every sleep should start on the back, and the side position is as dangerous as the stomach position (AAP, 2026). Once a baby can roll both ways, you do not need to keep turning them back, but the sleep space should stay clear of anything they could roll into (AAP, 2026).

The second is bed sharing, often reached for when nights are draining. The guidance draws the line clearly: room sharing yes, bed sharing no. The AAP recommends avoiding bed sharing with a baby under any circumstances, including with twins and multiples (AAP, 2026); the NHS says not to share a bed if your baby was born prematurely or weighed under 2.5 kg, or if you or your partner smoke, drink alcohol, or take medication that makes you drowsy (NHS, 2025). Falling asleep with a baby on a sofa or armchair is excluded in all situations (Lullaby Trust, 2025; NHS, 2025).

The third is equipment sold as a solution. Nests, pods and rolled towels do not belong in a sleep space (Lullaby Trust, 2025), and weighted blankets, weighted sleepers or swaddles should not be used on or near a baby (AAP, 2026). Personal monitors are no substitute for an adult nearby: there are no devices on the market that can replace a parent or carer being in the same room (Lullaby Trust, 2025).

When and where to get help

There is no wake count that says see a doctor. In the UK, the first stop is your health visitor or GP: they advise on sleep and routines, and they are who to call when you are worried (NHS, 2025). In the US, your baby's pediatrician plays the same role (AAP, 2026). And asking for support is part of the standard advice: newborn babies wake repeatedly for the first few months, so share the load where you can and call on friends or family when you are running on empty (NHS, 2025).

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