Helping your baby sleep — calmly, safely, and with less worry

How much sleep, by age

Sleep needs change quickly in the first two years, and every baby is a little different. Use these as friendly guidelines rather than targets to hit exactly — what matters is your baby's overall pattern and that they seem rested and content.

Age	Total sleep in 24 hours	What's normal
Newborn (0–3 months)	About 14–17 hours	Spread across many short naps; waking to feed through the night is expected.
Infant (4–12 months)	About 12–16 hours (incl. naps)	Longer night stretches often emerge around 4–6 months; usually 2–3 naps.
Toddler (1–2 years)	About 11–14 hours (incl. naps)	Typically settles into one daytime nap over the second year.

Ranges follow the consensus figures summarised by the Sleep Foundation and the NHS. Babies who are growing well and generally happy can sit at the lower or higher end of these ranges and still be perfectly healthy.

Safe-sleep basics

Safe sleep is the one area where the guidance is firm and consistent across health bodies, because it's about reducing the risk of sudden infant death (SIDS). The American Academy of Pediatrics' 2022 recommendations and the NHS safer-sleep advice agree on the essentials:

• Back to sleep, every sleep. Place your baby on their back for naps and at night until age one. Side and tummy sleeping are not advised for sleep.
• Firm, flat, separate surface. Use a crib, bassinet or cot that meets current safety standards, with a firm flat mattress — not an inclined surface, sofa, armchair or your own bed.
• Keep the space clear. No loose blankets, pillows, duvets, bumpers or soft toys in the sleep area.
• Room-share, don't bed-share. The AAP advises baby sleeps in your room on their own surface, ideally for at least the first 6 months; room-sharing is linked with a substantially lower SIDS risk than bed-sharing.
• A pacifier at sleep may help. Offering a pacifier at nap and bedtime is associated with a lower SIDS risk; if breastfeeding, it's usually suggested once feeding is well established.
• Rethink swaddling once rolling starts. The AAP notes there's no evidence swaddling reduces SIDS, and a swaddled baby who rolls onto their tummy is at higher risk — so stop swaddling as soon as your baby shows any sign of rolling.

Building a calm bedtime routine

A short, predictable wind-down helps signal to your baby that sleep is coming. The NHS and Mayo Clinic both highlight consistency as the active ingredient — the same calming steps, in the same order, around the same time each night.

A simple routine many families use is something like: a warm bath, into a fresh sleep outfit, a quiet feed, a short story or lullaby, then dimmed lights and into bed. The exact steps matter less than repeating them, so your baby learns what's next. Keeping the room dark and quiet at night (and brighter, more sociable by day) also helps their developing body clock tell day from night.

Drowsy but awake

One of the most widely shared tips from pediatric sources: try putting your baby down drowsy but still awake, rather than fully asleep. Watch for tired signs — yawning, rubbing eyes, looking away, fussiness — and head to bed before they're overtired. Settling in their own bed while still awake helps babies practise falling asleep on their own, which over time can mean fewer wakeful calls for help during the night.

Self-settling tends to develop with age. Many babies become more able to soothe themselves and resettle from around 6 months, which is often when families consider gentle sleep-training approaches. Methods vary, families and experts hold different views, and it's a personal choice — your pediatrician can help you weigh what fits your baby and your situation.

Sleep regressions & night waking

If sleep suddenly gets worse after a good patch, you're not doing anything wrong. The well-known "4-month sleep regression" reflects a real, healthy change: a baby's sleep cycles mature and their circadian rhythm develops, which can mean more night waking for a while. Cleveland Clinic notes these phases usually last a week or two before things settle again.

Riding it out with your usual calm routine, plenty of daytime light and activity, and consistent responses is generally the most helpful approach. If the disruption drags on well beyond a couple of weeks, or feels different from a typical rough patch, it's reasonable to check in with your doctor.

When to talk to a doctor

Trust your instincts. It's worth contacting your pediatrician, GP or health visitor if:

• There's a new or lasting change in how your baby sleeps, or new trouble going to sleep or staying asleep.
• A regression doesn't pass after a couple of weeks, or your usual routine stops helping.
• Your baby seems unusually difficult to settle, excessively sleepy, or unwell.
• Anything simply doesn't seem right to you — worrying about your child is normal, and a quick conversation can set your mind at ease.

For anything urgent — especially breathing difficulties — seek medical help immediately rather than waiting.

Quick answers

What's the single most important sleep safety rule?

Back to sleep, on a firm flat surface with nothing soft around your baby, for every sleep until age one.

Will a pacifier help my baby sleep more safely?

Offering a pacifier at nap and bedtime is associated with a lower SIDS risk. If you're breastfeeding, it's generally suggested once feeding is established.

Is it normal for my 4-month-old to suddenly wake more?

Yes — this is a common, healthy phase as sleep cycles mature, and it usually settles within a week or two.

Can I sleep-train my baby, and is it harmful?

Many families consider gentle approaches from around 6 months. Studies of structured methods like the Ferber approach haven't found evidence of long-term harm to attachment or emotional wellbeing, but views differ and it's a personal decision — your pediatrician can help you choose.

More sleep guides

We're building a calm, well-sourced library of parent guides. These are on the way:

Sources

• American Academy of Pediatrics — A Parent's Guide to Safe Sleep and the 2022 updated safe-sleep recommendations.
• NHS — Helping your baby to sleep.
• Sleep Foundation — How much sleep do babies and kids need?
• Mayo Clinic — Helping baby sleep through the night.
• Cleveland Clinic — The 4-month sleep regression.
• HealthyChildren.org — Getting your baby to sleep.

Ninna is a monitoring app, not a medical device or healthcare provider. This guide is general information, last reviewed June 2026, and is not medical advice. Always follow the guidance of your own doctor, pediatrician, GP or health visitor, and check your national health service for the safe-sleep advice that applies where you live.