Safe sleep for your baby, and what to do about the family bed

The safest way for a baby to sleep is on her back, on a firm flat surface with nothing else in it, in her own space close to your bed. Most Indian babies share the big bed with their parents, and Dr Dutta never scolds anyone for that. But a few habits make sleep far more dangerous, and every one of them is easy to change once you know it.

What is SIDS, and why do doctors worry about it?

SIDS (sudden infant death syndrome) is the sudden death of a healthy-seeming baby during sleep, where no cause is found even after a full check. Doctors group it with deaths from suffocation or being trapped in bedding, because the same habits raise the risk of both.¹

The leading idea is the "triple risk" model. A baby dies only when three things meet: a hidden weakness in the baby (often in the part of the brain that wakes her when air runs short), a risky stage of early development, and an outside trigger such as lying face down or soft bedding over the face.^2,1

We cannot yet tell which babies carry that hidden weakness. So we remove the outside triggers for every baby. That part is in your hands.

Why should my baby sleep on her back?

Sleeping face down roughly triples the risk of SIDS compared with sleeping on the back.³ So put your baby down on her back for every sleep, day and night, until her first birthday.^1,4

For more than 40 years, baby books told parents to put babies on their tummies. A large review later showed that the evidence against this was there by 1970, and that acting on that evidence earlier might have prevented tens of thousands of deaths.³ When countries switched to back sleeping, deaths fell sharply.¹

Naps count too. A baby who always sleeps on her back but is put on her tummy once, at a relative's house, is at special risk.⁵

Will my baby choke on spit-up if she sleeps on her back?

No. A healthy baby on her back swallows or dribbles out milk that comes up, and the back position is advised even for babies with reflux.⁶

This is the fear Dr Dutta hears most from grandmothers. When a baby lies on her back, the windpipe sits above the food pipe. Milk that comes up tends to pool at the back of the mouth, and the baby swallows it again or it runs out at the side. On her tummy, the baby is less able to clear it.

UK guidance on reflux says plainly that sleeping position should not be used to treat reflux, and that babies with reflux should also go down on their backs.⁶ If your baby has a medical problem of the airway, your doctor will tell you if anything is different for her.

Is it safe for my baby to sleep on her side?

No. Side sleeping is not a safe middle path, because babies roll easily from the side onto the tummy.¹

In one large analysis of swaddled babies, the risk was highest when they were placed on the tummy and next highest when they were placed on the side.⁷ Rolled towels or wedges to hold a baby on her side are also unsafe. Products that claim to keep a baby in one position have been linked to deaths.⁴

What about when your baby starts rolling? Keep putting her down on her back. Once she can roll both ways, back to front and front to back, on her own, you can leave her in the position she chooses.⁴

What does a safe cot or sleep space look like?

A safe sleep space is firm, flat and bare: a cot, crib or bassinet with a firm mattress, a fitted sheet, and nothing else.^1,4

"Firm" means the mattress springs back at once when you press it. "Flat" means level, not tilted at one end. Soft surfaces such as a thick gadda, memory foam, a sofa or a pile of quilts can trap a baby's face.⁴

Take out pillows, soft toys, bumpers, loose sheets, quilts and blankets.⁴ Cot bumpers do not prevent injury and can cause suffocation and wedging.⁵ In winter, dress your baby in one more layer of clothing instead of adding a blanket.

A simple cot or a firm bassinet beside your bed is all you need. You do not need anything expensive.

Is the rai (mustard seed) pillow safe for my newborn?

Dr Dutta advises against it. Any pillow in a young baby's sleep space is a suffocation risk, and safe sleep guidance asks for no pillows at all.^1,4

She knows why families love the little mustard seed pillow. It is meant to give the baby a nicely rounded head. But a pillow can tilt the head forward, slide over the face, or let the baby wedge against it.

A flat patch at the back of the head is common in babies who sleep on their backs. It is usually mild and improves as babies spend more time upright. The better fix is turning her head to alternate sides when you put her down, and tummy time while she is awake and someone is watching, which the AAP also encourages.¹ If the flat patch looks marked, or her head always turns to one side, ask your paediatrician to check her neck.

Can my baby sleep in a car seat, swing or rocker?

Not for regular sleep. If your baby falls asleep in a car seat, pram, sling or swing, move her to a flat cot as soon as you can.⁴

In a sitting or tilted position, a young baby's head can flop forward so the chin rests on the chest. This can narrow the airway, and a small baby may not have the neck strength to lift her head again.⁴ The 2022 American Academy of Pediatrics (AAP) advice also warns against tilted or inclined sleep surfaces.¹

A car seat is the right place for a baby in a moving car. It is not the right place for a long nap at home.

Is it safe to sleep with my baby in our bed?

The safest plan is for your baby to sleep in her own cot in your room, close to your bed, ideally for at least the first 6 months.^1,5 Bed sharing carries some risk even in good conditions, especially in the first 3 months.⁸

The evidence is debated. A pooled study of 1,472 SIDS deaths found that bed sharing raised the risk even when parents did not smoke and the baby was breastfed, though the absolute risk stayed small.⁸ Another UK study found no clear extra risk from bed sharing when hazards such as alcohol, smoking, sofas and preterm birth were absent.⁹

Because of this, UK guidance takes a practical line. It asks doctors to discuss safer bed sharing with parents instead of only forbidding it.¹⁰ Dr Dutta takes the same view. She would rather you know how to make the family bed as safe as possible than pretend nobody will use it.

When is bed sharing most dangerous?

Bed sharing is most dangerous when a parent smokes, has drunk alcohol, or has taken medicine that causes drowsiness, and when the baby was born small or early.^10,5 In these situations, please do not share a bed at all.

In one UK study, sharing a sleep surface next to a parent who had drunk more than 2 units of alcohol raised the risk about 18 times.⁹ Sleeping next to a smoker raised the risk about 9 times in babies under 3 months.⁹

Avoid bed sharing if:

• either parent smokes, even if never in the bedroom (this includes bidi and hookah)
• anyone in the bed has had alcohol, sleeping tablets, drowsy cough syrup or any drug that makes them sleep heavily¹⁰
• your baby was born preterm or with low birth weight^10,5
• you are extremely tired, for example in the first days after a caesarean⁵
• the mattress is soft, or the "bed" is a sofa or armchair⁵
• the adult next to the baby is not a parent, such as a grandparent or older sibling⁵

Is it dangerous to fall asleep with my baby on the sofa?

Yes. A sofa or armchair is the most dangerous place to fall asleep with a baby, far riskier than a bed.⁹

In the UK study, falling asleep with a baby on a sofa raised the risk of SIDS about 18 times.⁹ Babies slip into the gap between the cushions and the adult's body, or get pressed against the back of the sofa.

Late night feeds are when this happens. If you feel yourself dozing while feeding on a sofa or chair, get up and put the baby in her cot. US safe sleep advice calls sofas and armchairs extremely dangerous places to fall asleep with a baby.⁴

If we do share a bed, how can we make it safer?

Use a firm mattress, keep the baby on her back, and keep pillows, quilts, other children and pets away from her.¹⁰

• A firm mattress, ideally low or on the floor, so a fall is short.
• Baby on her back beside the mother, not between two adults.
• No pillows or heavy quilts near her. Push the bolsters (pash balish) away.¹⁰
• No gaps between the mattress and the wall where she could slip down.
• No other children or pets in the bed.¹⁰
• A cool room and light clothing.

Bolsters are meant to stop the baby rolling off the bed. In practice they can roll against her face, and babies wriggle down and wedge under them. A cot fixed flush to the side of your bed gives you most of the convenience with much less risk.

Does breastfeeding lower the risk of SIDS?

Yes. Babies who get any breast milk have a lower risk of SIDS, and the protection is stronger when breastfeeding is exclusive.¹¹

A review of 18 studies found that any breastfeeding roughly halved the risk after other factors were taken into account.¹¹ The AAP lists feeding with human milk as one of its steps to lower SIDS risk.¹

Exactly why is not fully known. Breastfed babies wake more easily from sleep and have fewer infections, and both may play a part. Expressed breast milk counts too.

Should I give my baby a dummy at sleep time?

A dummy (pacifier) offered when you put your baby down to sleep is linked with a lower risk of SIDS.^12,1

In one review of case-control studies, using a dummy at the last sleep was linked with less than half the risk.¹²

• If you are breastfeeding, wait until feeding is going well before you start.⁴
• Do not force it. If it falls out after she sleeps, leave it out.⁴
• Never coat it in honey, sugar or anything sweet.⁴
• Never tie it to clothing or a string around the neck.⁴

A dummy is optional. If your baby refuses it, that is fine.

Do vaccines increase the risk of SIDS?

No. Vaccinated babies have a lower risk of SIDS, not a higher one.¹³

Because the first vaccines fall in the same months as the peak risk of SIDS, people have sometimes linked the two. A review of studies that adjusted for other factors found that immunised babies had about half the risk of SIDS.¹³ The AAP lists routine immunisation among its safe sleep steps.¹ Please keep to the schedule.

Is swaddling my baby safe?

Swaddling can calm a young baby, but it does not lower SIDS risk, and it must stop once your baby starts trying to roll.⁵

A swaddled baby who ends up on her tummy cannot push herself up. The risk of swaddling rises sharply if a baby is placed on her front or side.⁷ So if you swaddle:

• always put her down on her back
• keep the wrap snug at the chest but loose at the hips, so her legs can bend up and out
• keep it thin in hot weather
• stop when she shows signs of rolling, which is often around 3 months⁵

Weighted swaddles and blankets are not proven safe for babies and are best avoided.⁵

How warm should my baby be at night in Kolkata?

Overheating raises the risk of SIDS, so dress your baby for the room, not for winter in Darjeeling.^1,4

In May and June a Kolkata bedroom can be very hot. A thin cotton vest and nappy may be all she needs. Feel the back of her neck or her chest, not her hands and feet, which are often cool. Sweating, damp hair, flushed skin or a hot chest mean she is too warm.⁴

Take off caps and woollen hats indoors.⁴ A ceiling fan is fine. In the AC, a light sleeping bag or one extra layer of clothing is better than a loose blanket.

Are mosquito nets, baby monitors and other gadgets safe?

Breathing and heart monitors sold to "prevent SIDS" do not work for that purpose.⁵ A mosquito net is fine if it is held taut and well away from your baby.

During dengue season a net is sensible. Choose one that is fixed above the cot, not draped over the baby, with no loose cords she could reach.

Home breathing, heart and motion monitors have not been shown to detect or prevent SIDS, and US safe sleep advice asks parents not to rely on them.⁵ No product can prevent SIDS.⁵ A simple audio or video monitor is fine for hearing your baby, but keep its cable well away from the cot.⁵

Check the corner where your baby sleeps for curtain cords, saree ends, plastic bags and anything with a string. Keep them all out of reach.

When should I call a doctor about my baby's sleep or breathing?

Seek urgent help if your baby ever seems to stop breathing, turns blue or very pale, goes floppy or stiff, or is hard to wake, even if she seems normal afterwards. Doctors call this a brief resolved unexplained event, and it needs a check the same day.

Call or visit your paediatrician if:

• your baby breathes noisily, snores loudly or has pauses in breathing during sleep
• she has reflux so severe that you are tempted to change her sleep position
• her head is very flat on one side, or she always turns one way
• she was born preterm and you are unsure what is safe at home
• you cannot see how to make the sleeping arrangement at home safe

There is almost always a workable answer, even in a small flat shared by three generations. Bring your questions to the next visit.