Safe sleep — what experts really recommend (and what is myth)

Sudden Infant Death Syndrome (SIDS) rates in the Netherlands and the UK have dropped by more than 80% since the 1980s. The single biggest factor was one simple guideline: place your baby on their back.

In this article we summarize what international experts recommend today, with sources to read further. We also address the myths that keep circulating.

The big four — what every guideline consistently states

1. Back sleeping until 12 months

Not on the stomach, not on the side. On the back, also during daytime naps. From the moment your baby can roll independently (usually 5-7 months), you don’t need to roll them back at night. But always place them on their back to start.

Source: American Academy of Pediatrics (AAP) 2022, NICE NG43, Lullaby Trust UK.

2. Crib in parents’ bedroom, not in your bed

Up to about 6 months, most guidelines recommend your baby sleep in their own crib or bassinet, in your bedroom. This halves the SIDS risk compared to a separate room during these months.

Sleeping in the same bed (bedsharing) is a different matter. It is discouraged under 4 months, and always when one parent smokes, has used alcohol or medication, or is severely fatigued.

Source: AAP Safe Sleep Guidelines 2022, Lullaby Trust UK.

3. Empty crib, no loose items

No pillows, no loose blankets, no toys, no bumpers around the mattress. A firm mattress with a fitted sheet, optionally a sleep sack underneath. That’s it.

The reason: a baby can roll under a blanket or have its face pressed against a stuffed toy and suffocate. It seems excessive until you see how many statistics trace back to this.

4. No smoking in the home during pregnancy or after

Even if no one smokes in the same room: nicotine particles cling to clothing and furniture. Smoking during pregnancy or in the home significantly increases SIDS risk.

Source: Lancet 2007 meta-analysis, Lullaby Trust UK.

A happy, awake baby. Safe sleep starts with a safe environment

Myths that keep circulating

Myth: “Stomach sleeping is safer because they won’t choke if they spit up”

Ironically, this was the advice before 1987. Then it was discovered the opposite is true: back sleeping is safer, even for babies with reflux. A healthy baby will swallow or turn their head automatically.

For medical reflux: discuss with your doctor. For the vast majority of babies: back, regardless of reflux.

Myth: “A hat in the crib keeps them warm”

No hat in the crib. Babies regulate their temperature through the head. A hat can cause overheating, an independent risk factor for SIDS.

Myth: “The baby sleeps more peacefully with a stuffed animal beside them”

Under 12 months, no stuffed toys in the crib. From 1 year onwards, a small lightweight comforter is fine, provided it is small and has no loose parts.

Myth: “A room can be warm for a newborn”

Ideally 16-18°C in the bedroom. Not warmer. Feel the neck (not the hands) to gauge if your baby is too hot or cold.

Family at home — a baby's sleep environment touches everyone in the house

Practical checklist

Run through this before the first night:

Crib on stable surface, not by a window with cords or curtains
Firm fitted mattress, no pillows, blankets or stuffed toys
Sleep sack in correct size (cannot ride up over the head)
Bedroom 16-18°C, no overheating
Crib in your bedroom for the first 6 months
No smoking in the home, including by visitors
Breastfeeding where possible (lowers risk per meta-analyses)

Baby comfortable on a couch — same rules during the day: on the back, no loose items

What if your baby only settles on their stomach?

Some babies clearly prefer being on their stomach. Still, the guidance remains to place them on their back, even if they protest. Tips:

Swaddling for young babies (only until they can roll): provides the snug feeling of stomach-sleeping without the risk
Sit beside the crib while they fall asleep: your presence calms
Build back-sleeping gradually: short back-naps during the day with you watching
Tummy time WHILE AWAKE: builds neck strength and helps some babies accept back-sleeping

When to call the doctor

Heavy snoring, breathing pauses, blue tinge → seek medical help immediately
Frequent reflux with crying after every feed → health visitor or GP
Doubt about warmth, clothing, or sleep environment → consult your local clinic / health visitor