Where Should Your Baby Sleep? A Plain-English Safe Sleep Guide

Here is the whole answer in one sentence, then the detail. For the first six months, the safest place for your baby to sleep is on their back, on a clear flat surface of their own, in the room where you are. Everything below is that sentence applied to real life, including the awkward questions about swings, car seats and the 4am chest nap.

One note before any of it: this guide follows NHS and Lullaby Trust safer sleep guidance, and where anything here seems to disagree with them, they win. So does your midwife, health visitor or doctor.

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The setup the safety experts agree on

On their back for every sleep, naps included, until they can roll both ways by themselves. A firm, flat, waterproof mattress that fits the cot without gaps. A clear sleep space: no pillows, no duvets, no cot bumpers, no soft toys, no wedges or sleep positioners, however safe the packaging claims to be. If you use blankets, tuck them firmly no higher than the shoulders with your baby's feet at the foot of the cot; a well-fitting baby sleeping bag does the same job with less to think about at 3am.

Keep the room comfortably cool, around 16 to 20 degrees, and the home smoke-free. And for the first six months, day and night, their sleep space lives in the same room as you.

So can they sleep in a...

The internet asks this about every product ever sold, so here is the honest sorting of the list.

Made for sleep: yes

Cot, crib, Moses basket, bedside crib, and a travel cot (pack n play) with its own firm original mattress. These are sleep spaces. If your baby sleeps there, the job is done.

Happens in motion: fine while it is moving, move them after

Car seats exist because cars exist, and babies will sleep in them. That is fine on a journey, with regular breaks on long drives, but a car seat is not a bed, so when you get home, the nap continues in the cot, not the hallway. The same logic covers prams: fine for a nap on the move where you can see them, not the overnight arrangement.

Not sleep spaces: move them when they drift off

Swings, bouncers, loungers and sleep pods, however expensive, are not designed for unsupervised sleep, and babies have limited head control, so a slumped position can restrict their airway. The same applies to carriers and slings: lovely for closeness, but keep the airway clear, chin off chest, face visible, and transfer them to a flat surface when sleep sets in properly.

Your chest: the honest answer

Babies love sleeping on chests and it is fine while you are fully awake. The danger is that you fall asleep too, and if that happens on a sofa or armchair it becomes the single riskiest sleep scenario there is. If you are so tired you might drift off during a chest nap, and every new parent is, put the baby down in their sleep space first, or move to the safest possible bed setup, covered next.

Co-sleeping, honestly

Plenty of families end up bed-sharing, planned or not, usually around a night feed. Pretending it never happens helps nobody, so know the rules that make it as safe as it can be. Never on a sofa or armchair, ever. Never if you or your partner have had alcohol, any drugs, or medication that makes you drowsy, or if either of you smokes. Not with a baby who was premature or small at birth. Keep adult pillows and duvets well away from the baby, and the baby on their back on a firm flat part of the bed, never between a parent and the wall or edge. The Lullaby Trust publishes full co-sleeping guidance and it is worth ten minutes of daylight reading precisely so the 3am decision is already made.

Positions, dummies and other 3am questions

Back is the position, every time, until your baby can roll from back to front and front to back on their own. Once they can, start them on their back and let them settle how they like; you are not expected to stand guard re-flipping them all night. Side sleeping is not a safe position for a baby who cannot roll. And stomach sleeping is for babies who put themselves there, not for being placed.

Dummies (pacifiers) are fine to offer at sleep times once feeding is well established, and if one falls out mid-sleep it does not need putting back. If your baby has never had one, there is no need to start; if the dummy is currently the reason for six wake-ups a night, that is a habit question rather than a safety one, and a solvable one.

When do they move to their own room?

UK guidance is their own sleep space in your room for the first six months. After that, the move to their own room is a family decision rather than a safety deadline, and plenty of babies, and parents, sleep noticeably better once it happens. A monitor buys peace of mind for the transition if you want one.

Past the first birthday, the rules relax gradually; pillows and duvets are for after age one.

When to talk to a professional

This guide covers healthy, full-term babies. If your baby was premature or small at birth, has any medical condition, or anything about their breathing or sleep worries you, your midwife, health visitor or GP is the right source, not a website, this one included.

Quick answers

Where should my baby sleep after 6 months?

Wherever suits your family: still in your room, or in their own. The six-month room-sharing guidance is the safety line; after it, the choice is yours, and the safe sleep space rules still apply wherever the cot lives.

Can my baby sleep in a swing or bouncer?

No. If they doze off in one, that is normal life, and the move is to transfer them to their flat sleep space rather than let the nap continue there.

Can my baby sleep on my chest?

While you are fully awake, yes. If there is any chance you will fall asleep too, put them down first, and never let a chest sleep happen on a sofa or armchair.

Can my baby sleep with a dummy?

Yes, once feeding is established. Offer it at sleep times if you use one, skip it if you do not, and leave it out if it falls out during the night.