Safe Sleep for Newborns: The Essentials

Safe sleep is one of the few areas of newborn care where the guidance is specific, evidence-based, and worth following exactly. It is also one where advice from well-meaning relatives is often years out of date.

Here is what current AAP guidance says, and why.

The three that matter most

Everything else follows from these.

On their back. For every sleep, day and night. Babies who sleep on their backs are much less likely to die suddenly than those placed on their front or side. This applies to naps as much as to night sleep - a nap in a different position is not a small exception.

On a firm, flat surface. A surface that does not indent under your baby's weight. A crib, bassinet, portable crib or play yard that meets current safety standards, with a mattress made for that specific product and fitting tightly. Not a sofa, not an armchair, not a car seat or swing for sleep.

With nothing else in the space. A fitted sheet and your baby. No pillows, quilts, comforters, loose blankets, bumper pads, or toys.

Room-sharing, not bed-sharing

Share a room with your baby for at least the first six months, with your baby on their own separate sleep surface - a bassinet or crib beside your bed.

Room-sharing and bed-sharing are not the same thing, and the difference matters. The AAP recommends against bed-sharing. The risk is higher still for babies under four months, babies born prematurely, and where an adult smokes or has used alcohol, medication or other substances that affect how deeply they sleep.

This is the point where a lot of parents quietly stop reading, because the reality of night feeding at 3am is not covered by a rule. So, plainly: if you are feeding at night, feed in your bed if you need to, but put your baby back on their own surface afterwards. The most dangerous version is falling asleep with your baby on a sofa or armchair - that carries more risk than a bed does. If you are so tired that you might fall asleep feeding, a bed cleared of pillows and bedding is safer than a couch.

If you want to talk through your own situation, a health visitor, midwife or pediatrician can do that without judgement. It is a better conversation to have openly than to improvise alone at night.

Keeping your baby warm

Dress your baby in layers, or use a wearable blanket, rather than covering them with anything loose.

Babies need about one more layer than you are comfortable in - not several. Overheating is a real risk. Check for sweating, a hot chest, or flushed skin. Once you are home from the hospital, your baby does not need a hat indoors.

Swaddling

Swaddling can help some babies settle, but it does not reduce the risk of sudden infant death, and it comes with its own rule:

Stop swaddling as soon as your baby shows any sign of rolling - usually around three to four months. A swaddled baby who rolls onto their front cannot push themselves back up. If your baby is swaddled, they still go down on their back, and the swaddle should not be tight.

Pacifiers

Offering a pacifier at nap time and bedtime is associated with a reduced risk of sudden infant death. If you are breastfeeding, wait until feeding is well established before introducing one. If it falls out once your baby is asleep, you do not need to put it back.

Smoking

Avoid nicotine exposure during pregnancy and after birth - cigarettes and vaping both. Smoking significantly increases the risk, and it makes bed-sharing considerably more dangerous.

Breastfeeding

Breastfeeding is associated with a lower risk of sudden infant death, and the longer it continues the greater the protective effect. If breastfeeding is not working for you, that is its own conversation and there is support available - but the other points on this list do not depend on it.

How long this lasts

These recommendations apply for your baby's whole first year, unless a health professional tells you otherwise for your baby specifically.

It is common to relax around four or five months, when a baby seems sturdier and sleep feels less fragile. The guidance does not change at that point.

What about rolling?

Once your baby can roll from back to front and front to back on their own, you do not need to keep turning them back through the night. Keep putting them down on their back to start, and keep the sleep space empty.

What to remember

Back, firm flat surface, empty space. Own sleep surface in your room for at least six months. One extra layer, no loose bedding. Stop swaddling at the first sign of rolling. All of it for the full first year.

If anything about your baby's sleep worries you, or your baby has a medical condition affecting their breathing or sleep, speak to your pediatrician - some babies are given individual advice that differs from the general guidance.