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Sudden Infant Death Syndrome (SIDS) in babies

Dr Roger Henderson
Reviewed by Roger HendersonReviewed on 29.04.2024 | 3 minutes read

Sudden Infant Death Syndrome (SIDS) is commonly referred to as cot death. It is the term for the sudden death of a healthy baby in its sleep that occurs without explanation or expectation. Thankfully, SIDS is rare with about 1 in 3,000 babies dying from it in the UK every year, but every death is one death too many, so the aim is to reduce the risk as much as possible

What increases the risk of SIDS?

Research so far has helped us understand a few things about babies who suffer from SIDS. It usually occurs when a baby is asleep, is most common during the first 6 months of life – especially between 2 to 4 months - and is more common in baby boys, children born prematurely or those with lower birth weight. Babies who are exposed to cigarette smoke, have too much bedding or who co-sleep with their parents are also at greater risk. While research hasn’t definitely confirmed it, these babies are thought to have mild difficulties with their heart or lungs. After the age of 6 months it becomes rare as this is the time babies start to become more mobile and can roll over.

What are the ways to reduce SIDS?

The way your baby sleeps is really important and there is lots of evidence-based advice on this.

Place baby on their back when they sleep on a firm mattress and with their feet touching the foot of the cot or basket. They should have a light blanket (not a duvet) up to their shoulders so they are less likely to slip under their bedding, and their head left uncovered.

Using sleepsuits instead of blankets is another way to reduce this risk.

It is advised that your baby sleeps in the same room as you for the first 6 months but avoid co-sleeping (especially if you smoke, drink alcohol or take any drugs or medications which may increase your drowsiness) as there is a risk you may roll over onto baby and suffocate them.

Breastfeeding is said to offer some protection against SIDS so this is always encouraged.

The temperature of the room is important, ideally placed between 16 and 20 degrees C as being too warm can increase the risk of SIDS.

Do not place baby’s cot next to a radiator or heater, or use things like electric blankets or hot water bottles with them.

Do not allow anyone to smoke near your baby and avoid smoking during your pregnancy or after the birth of your child. Where they sleep should be a strict smoke-free zone.

What signs should I look out for?

Watch out for signs your baby is too hot or cold – they may be sweating, shivering or gasping for breath. If your baby is struggling for breath, turns blue, is difficult to arouse, becomes unconscious or has a fit, dial 999 immediately for an ambulance.

 The Lullaby Trust has some great resources on reducing the risk of SIDS and also offers emotional support for bereaved families.

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Dr Roger Henderson
Reviewed by Roger Henderson
Reviewed on 29.04.2024
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