Safe sleep for newborns: the rules to follow

SIDS (Sudden Infant Death Syndrome) is rare, but it is the leading cause of death among babies between 1 and 12 months in developed countries. The good news: by following a few simple rules, the risk drops dramatically.

The golden rule: on their back

Your newborn should always sleep on their back (supine position). This single rule has cut SIDS cases by 50% since it was introduced.

The ideal sleep environment

The surface

• A firm, flat mattress that fits the crib exactly
• No pillows until 12 months
• No soft blankets, duvets, or crib bumpers — use a sleep sack instead
• No stuffed animals or toys in the crib

Temperature

• The room should be between 18 and 20 C (64-68 F)
• Your baby should not be too warm — check the back of their neck (it should feel warm, not sweaty)
• Dress your baby in one layer more than what you are wearing

The room

• The crib should be in your bedroom for at least the first 6 months
• But the baby should sleep in their own crib, not in your bed

Other recommendations

The pacifier

Offering a pacifier at bedtime appears to have a protective effect. If your baby refuses it, do not insist. If it falls out during sleep, there is no need to put it back.

Breastfeeding

Breastfeeding is associated with a lower risk of SIDS. Even partial breastfeeding offers protection.

No smoking

Do not smoke during pregnancy and do not expose your newborn to secondhand smoke. Smoking is one of the main risk factors.

Vaccinations

Babies vaccinated according to the recommended schedule have a lower risk of SIDS. Vaccinations are protective.

Common mistakes

• Over-dressing the baby out of fear they might be cold
• Using nest inserts, positioners, or anti-suffocation pillows (they are unnecessary and can be dangerous)
• Letting the baby sleep in a car seat, infant carrier, or bouncer for extended periods

The rules of safe sleep are simple and they save lives. Follow them every time, including for daytime naps.