Is Co-Sleeping Safe for Babies? What Are the Risks and Benefits?

It's 2:47am. Your baby has fed, burped and finally drifted off on your chest. You hold your breath, lower them into the cot with the precision of a bomb disposal expert, and... eyes open. Again. So you do what parents have done for thousands of years. You bring them into bed, they latch, you both sigh, and the next thing you know, it's morning.

And then the worry kicks in. Was that safe? Should I feel guilty? Why does the clinic sister say one thing, my mother-in-law another, and the internet about four hundred more?

Let's be honest, co-sleeping is one of the most emotionally loaded topics in baby sleep. Some sources make it sound like a cosy bonding ritual, others make it sound about as risky as leaving the stove on. The truth, as with most things in parenting, sits somewhere far more nuanced (and far more useful) than either extreme.

In this guide, we'll untangle the words (co-sleeping, bed-sharing, room-sharing and breastsleeping are not the same thing), look at what the World Health Organization and other major health bodies actually recommend, unpack Professor James McKenna's decades of research on mothers and babies sleeping together, and give you a clear, judgement-free picture of the risks and benefits. The goal is simple: informed, not afraid.

What Is the Difference Between Co-Sleeping, Bed-Sharing and Room-Sharing?

Part of the reason this topic feels so confusing is that everyone uses the same word to mean different things. The Academy of Breastfeeding Medicine actually avoids the word "co-sleeping" in its own clinical protocol because it is used so loosely (Blair et al., 2020). So let's get our vocabulary straight before we go any further.

• Co-sleeping is the umbrella term. It simply means your baby sleeps close to a caregiver, either on the same surface or within sight, sound and touch. Room-sharing and bed-sharing are both forms of co-sleeping.

• Room-sharing means your baby sleeps on their own separate surface, such as a bassinet, cot or camp cot, in your bedroom. Close enough to hear every snuffle and squeak, but not in your bed.

• Sidecar sleeping is a cot or bedside crib fixed flush against your bed at mattress height. Your baby has their own space, but you can reach them without getting up. For many breastfeeding families, it is a lovely middle ground.

• Bed-sharing means your baby sleeps on the same adult bed as you.

• Breastsleeping is a term coined by Professor James McKenna and Dr Lee Gettler to describe bed-sharing between a breastfeeding mother and her baby, where feeding and sleeping are woven together through the night (McKenna & Gettler, 2016).

• Sofa or armchair sharing means falling asleep with your baby on a couch, recliner or chair. Hold that thought, because this is the one arrangement every single health body agrees is the most dangerous of all.

  
  

Why does this matter? Because when a headline says "co-sleeping increases SIDS risk", it may be lumping a breastfeeding mother on a firm mattress together with an exhausted parent who dozed off on the couch after a couple of beers. Those are very different situations, with very different risks.

What Does the WHO Recommend About Co-Sleeping and Bed-Sharing?

This is one of the most searched co-sleeping questions, so let's be precise. The World Health Organization's global guidance is built around keeping mothers and babies together. Under the WHO and UNICEF Baby-Friendly Hospital Initiative, maternity facilities are asked to let mothers and babies stay together and practise rooming-in 24 hours a day, and WHO recommends exclusive breastfeeding for the first six months (WHO & UNICEF, 2018). In other words, closeness is the WHO's starting point.

What the WHO does not publish is a detailed, at-home rulebook on bed-sharing. That job falls to national and specialist bodies, and this is where the advice starts to differ.

The American Academy of Pediatrics (AAP) recommends room-sharing without bed-sharing, ideally for at least the first six months, and does not recommend bed-sharing. It does acknowledge that parents may fall asleep while feeding, and that an adult bed cleared of pillows and loose bedding is far less hazardous than a sofa or armchair (Moon et al., 2022).

The NHS and The Lullaby Trust in the UK say the safest place for your baby is on their own surface in your room, but they take a harm-reduction approach. Because so many families bed-share, planned or not, they give parents clear guidance on how to do it more safely (The Lullaby Trust, 2026).

The Academy of Breastfeeding Medicine (ABM), in its Protocol #6, recommends that every family receives safe bed-sharing information. It states that the existing evidence does not support the conclusion that bed-sharing among breastfeeding babies causes SIDS in the absence of known hazards, and it calls for an end to the stigma around bed-sharing (Blair et al., 2020).

So why are some doctors so against co-sleeping? Mostly because a simple message is easier to share than a nuanced one. "Never bed-share" fits neatly on a pamphlet. But as the ABM points out, telling families never to bed-share doesn't stop them from doing it. It often just stops them from telling their doctor, which removes the chance to make it safer. And research shows that on any given night, 20 to 25% of babies under three months in the UK and US share a bed with a parent for at least part of the night (Blair et al., 2020). You are far from alone.

Is Co-Sleeping Safe? What Does the Research Say About SIDS?

Here's the plot twist that changes the whole debate: the risk depends far more on the circumstances than on the bed itself.

A large UK analysis of two case-control studies found that when hazardous circumstances were absent, bed-sharing was not associated with a significant increase in SIDS risk. When hazards were present, the picture changed dramatically. Sleeping next to an adult who had drunk more than two units of alcohol was linked to an 18-fold increase in risk, and sleeping with a baby on a sofa carried a similar 18-fold increase (Blair et al., 2014). Bed-sharing where there was smoking exposure more than quadrupled the risk (The Lullaby Trust, 2026).

So how common is SIDS with co-sleeping? Roughly half of sudden infant deaths happen in a shared sleep environment, but most of those involve one or more of these known hazards (Blair et al., 2020). A national review in England found that almost all of the sudden infant deaths it examined involved parents co-sleeping in unsafe circumstances, very often after alcohol or drug use. The review was titled Out of Routine for a reason: so many of these tragedies happened when the family's usual routine had been disrupted (Child Safeguarding Practice Review Panel, 2020).

What this means for you: the nights that need the most care are often the unusual ones. The wedding, the braai that ran late, the holiday house with an unfamiliar bed, the night after an exhausting day in hospital. Those are the nights to have a plan.

What Is Breastsleeping, and What Does Professor McKenna's Research Show?

If there's one name you'll meet again and again in the co-sleeping conversation, it's Professor James McKenna. He founded the Mother-Baby Behavioral Sleep Laboratory at the University of Notre Dame and has spent more than three decades filming, measuring and studying mothers and babies as they sleep. His central argument is beautifully simple: human babies evolved to sleep beside their mothers, and for most of human history, babies didn't sleep anywhere else.

Together with Dr Lee Gettler, he summed it up in one now-famous line: "There is no such thing as infant sleep, there is no such thing as breastfeeding, there is only breastsleeping" (McKenna & Gettler, 2016). McKenna has also turned the usual question on its head, asking whether we should really be asking if it is safe not to sleep near our babies.

So what did the sleep lab actually find when breastfeeding mothers and babies share a bed?

• Mothers naturally adopt a protective "C-position" or "cuddle curl". Her arm rests above baby's head, her knees curl up beneath baby's feet, and baby lies flat on their back at breast height, well away from the pillows. In video studies, mothers who had never breastfed showed this protective posture less consistently (Blair et al., 2020).

• Mother and baby become physiologically in tune. Their sleep stages, breathing and brief arousals influence each other through the night, a kind of two-person sleep dance (Barry & McKenna, 2022).

• Babies spend more time in lighter sleep and rouse more easily. That sounds like bad news for tired parents, but researchers believe these frequent micro-arousals may be protective, because a baby who rouses easily can respond to a breathing challenge (Blair et al., 2020).

• Babies feed more often, and breastfeeding lasts longer. Bed-sharing babies can have double to triple the number of night feeds of babies sleeping alone, which helps protect milk supply (Blair et al., 2020).

  
  

More recent research has built on this. A 2025 systematic review of 24 studies found that most showed a positive link between bed-sharing and breastfeeding (Wolf et al., 2025). In 2022, McKenna and colleagues went a step further, arguing that in the absence of hazards, bed-sharing may explain part of the lower SIDS risk we see in breastfed babies, and that it is time to revisit the assumption that the shared bed itself is the danger (Bartick et al., 2022).

Now for the important nuance, which McKenna is clear on too. Breastsleeping describes a specific situation: a breastfeeding mother, a healthy full-term baby and a safe bed with no hazards present. It does not mean every form of bed-sharing is equally safe. The research supporting breastsleeping does not extend to a parent who has had a few glasses of wine, a baby sleeping under a heavy duvet, or a nap on the couch.

What Are the Benefits of Co-Sleeping for Babies and Parents?

When families tell me why they co-sleep, the reasons are almost always rooted in love and survival. Research reflects exactly that. In a review of why mothers bed-share, McKenna and Dr Elaine Barry found the most common reasons were breastfeeding, comforting the baby, getting more sleep, keeping an eye on the baby, bonding, cultural or family tradition, and plain maternal instinct (Barry & McKenna, 2022).

• Easier breastfeeding. Night feeds are a big part of building and protecting your milk supply, and having your baby within reach makes those feeds quicker and calmer for both of you.

• More sleep for you (yes, really). Breastfeeding mothers who bed-share do wake often, but they tend to be awake for shorter periods and fall back to sleep faster. Many achieve more total sleep than mothers who get up to feed in another room (Blair et al., 2020). Think of it as a quick espresso shot of a wake rather than a full sit-down cappuccino.

• Responsiveness and comfort. Your baby's needs are met quickly, often before they fully wake and escalate into crying. For a sensitive baby, that closeness can be deeply regulating.

• It's culturally normal. In South Africa, many families across African, Indian, Muslim and other communities have shared sleep with their babies for generations. Solitary infant sleep is a fairly recent, mostly Western idea. Whatever your family's tradition, it deserves respect and accurate safety information, not judgement.

• Do babies who co-sleep wake up more? Often, yes. Breastsleeping babies spend more time in light sleep and feed more frequently. That's by design rather than a fault. The question is whether those wakes feel manageable, or whether you're running on fumes. If your baby is waking every hour, our guide on why your baby is waking every hour at night explains what might be going on.

• Are children who co-sleep happier? The honest answer is that the research doesn't show co-sleeping makes children happier, or less happy. What it does show is that secure attachment comes from warm, responsive care, and that can happen in your bed, beside your bed or across the passage.

  
  

What Are the Risks of Co-Sleeping, and When Is Bed-Sharing Not Safe?

This is the section to read twice. The ABM, AAP and Lullaby Trust may disagree on whether bed-sharing should ever be recommended, but they agree completely on when it is dangerous. Bed-sharing is not safe when:

• You're on a sofa, couch, recliner or armchair. This is the highest-risk sleep situation of all. If you feel yourself nodding off while feeding on the couch, move to a prepared bed or put your baby down on their own surface.

• Anyone in the bed has had alcohol, used recreational drugs or taken medication that causes drowsiness. Even a small amount can blunt the natural arousals that keep your baby safe.

• Anyone in the bed smokes, even if they never smoke in the bedroom, or if your baby was exposed to smoking during pregnancy.

• Your baby was born prematurely (before 37 weeks) or with a low birth weight (under 2.5kg). These babies should sleep on their own surface beside you.

• Your baby is not breastfed. The protective behaviours seen in breastsleeping are less consistent in formula-feeding pairs, and the ABM notes that the safety picture is different (Blair et al., 2020). A sidecar or bassinet beside your bed keeps your baby close without the added risk.

• The bed is soft or cluttered. Waterbeds, very soft mattresses or toppers, beanbags, heavy duvets, pillows near baby and soft toys all increase the risk of breathing being obstructed.

• Other children or pets are in the bed, or your baby is left alone on an adult bed, even for a few minutes.

• You are so exhausted or unwell that you know you would struggle to wake.

  
  

The AAP also highlights the first four months as the most vulnerable window, even when no other hazards are present (Moon et al., 2022). The early months are when everyone agrees extra care matters most.

And there's one risk that doesn't get talked about enough: the unplanned bed-share. Many parents who are determined never to co-sleep end up dozing off with their baby on the couch at 3am, precisely because they're trying so hard to stay awake. Ironically, that is far more dangerous than a planned, prepared bed. The ABM notes that advice to avoid bed-sharing may increase the risk of babies sleeping in unsafe places such as sofas (Blair et al., 2020).

How Can You Make Bed-Sharing Safer If You Choose to Do It?

If you choose to bed-share, or think you might end up doing so on the tough nights, here is the ABM's safe bed-sharing guidance, listed in order of importance (Blair et al., 2020), with a few practical additions from The Lullaby Trust (2026):

1. Never sleep with your baby on a sofa, armchair or pillow.

2. Keep your baby away from anyone affected by alcohol, drugs or sedating medication.

3. Always place your baby on their back to sleep, for every sleep, day and night.

4. Keep your baby away from smoke, including the smoke that clings to clothes, hair and bedding.

5. Move the bed away from walls and furniture so there are no gaps your baby could slip into or get wedged in.

6. Use a firm, flat mattress and keep pillows and duvets well away from your baby. Dress your baby in a light sleeping bag rather than under adult covers, and avoid overheating.

7. Never leave your baby alone on an adult bed.

8. Sleep in the C-position, with your baby on their back beside you at breast height, away from the pillows. Don't swaddle your baby when bed-sharing, as they need their arms free.

Have a 3am plan. Decide in daylight, not at 3am. Even if you intend never to bed-share, set up your bed as though you might: pillows pushed up, duvet folded back, no gaps at the edges. That way, if you do fall asleep feeding, your baby is in the safest possible place.

If you'd like a full room-by-room checklist, my Safe Sleep and Optimal Sleep Environment Guide walks you through everything from mattress firmness to room temperature in a hot KZN summer.

Download our Safe Cosleeping guide For Free. CLICK HERE

At What Age Is Co-Sleeping Safer, and Is It Okay to Co-Sleep With a Toddler?

SIDS risk peaks between one and four months, and the vast majority of cases happen before six months of age. That's why the first six months, and especially the first four, are when safe sleep guidance matters most. After your baby's first birthday, SIDS is no longer the main concern.

Is it okay to co-sleep with a 2-year-old? Yes, if it's working for your family. Toddler co-sleeping becomes a question of sleep quality and preference rather than safety. The practical checks change, too: think about falls, gaps between the bed and the wall, and whether everyone is actually sleeping well.

My 2-year-old suddenly wants to sleep in our bed. What should I do? First, know that this is incredibly common. Toddlers often seek closeness at night during big developmental leaps, a new sibling, starting school or a peak in separation anxiety. A 2023 study of over 900 preschoolers found that nearly 4 in 10 parents reported their child coming into their bed at night, and most of those children had stopped on their own within two years (Marakovitz et al., 2023).

Does co-sleeping cause separation anxiety or "codependency"? The same study found that children who were anxious or having night terrors were more likely to end up in their parents' bed, but there was no evidence that bed-sharing caused later anxiety or sleep problems (Marakovitz et al., 2023). In other words, anxious children seek out their parents at night. The bed isn't making them anxious. Your role is to support your child's big feelings, not to make them disappear. If you're curious how this ties into attachment, our post on parenting styles and attachment is a great next read.

Can You Sleep Train While Co-Sleeping, or Move a Co-Sleeper to Their Own Bed?

Absolutely. Co-sleeping is not a trap, and it doesn't mean your baby will be in your bed until they leave for university.

Here's what is usually going on. When your baby falls asleep feeding beside you, that becomes their recipe for sleep. Each time they surface between sleep cycles (which all babies do, several times a night), they look for the same ingredients to drift off again. These are called sleep associations, and they're completely normal. If the arrangement is working for everyone, there's nothing to fix. If it isn't, changing the pattern is a normal, healthy step that most families need at some point, not a last resort.

Some gentle starting points:

• Start with the first stretch of the night. Many families begin by having their baby fall asleep in a cot or sidecar at bedtime, with the option of coming into bed after a later feed. This split-night arrangement is common and can be a comfortable bridge.

• Make the new space familiar in daylight. Play, read and cuddle near the cot during the day so it feels safe and known before it is asked to be a sleep space.

• Stay close as you make changes. Your presence is a powerful bridge, and you can gradually reduce how much hands-on help you give over time. If you're working on daytime sleep too, our guide to moving away from contact naps gently follows the same principles.

• For toddlers, a comfort item can help. Once your child is past 12 months, a safe comfort item can carry some of that sense of closeness into their own b

If you're wondering how to put all of this into a plan, our post on when and how to start sleep training gently is a good place to begin. Toddlers who are moving from a family bed into their own bed may also find our guide on moving from cot to bed helpful.

"Zara was nine months old and still bed-sharing and feeding every hour or two. I loved the closeness, but I was running on empty and my back was killing me. I didn't want to just shut the door on her. Ohara helped me understand why Zara was waking so often, and we built a gentle plan that started with her first stretch of the night in her cot, right next to our bed. I stayed with her every step of the way. Within three weeks she was sleeping through the night in her own cot, and our morning cuddles in bed are now the best part of my day." Thandeka, Ballito

What If Co-Sleeping Isn't Working for Your Family Anymore?

Maybe your partner has quietly migrated to the couch. Maybe you're being kicked in the ribs by a starfishing toddler every night. Maybe your baby is waking every hour and you can't remember what a full night's sleep feels like. If co-sleeping started as a lifeline and now feels like a tangle, that is not failure. Needs change, babies change, and so can your plan.

Setbacks are normal, too. Illness, teething, travel and developmental leaps often bring a little one back into the big bed for a few nights. That's okay. It doesn't undo your progress. Comfort your child, keep the bed safe, and gently return to your plan once the storm passes.

And if you're bed-sharing because you simply don't have another safe space for your baby, a safe sleep surface doesn't need to be expensive. A firm, flat camp cot beside your bed is a perfectly safe option.

Are You Doing It Wrong If You Co-Sleep?

No, Mama. You are not doing it wrong. Wanting your baby close is one of the oldest, most human instincts there is. The real question was never "should I feel guilty?" It's "is our sleep arrangement as safe as it can be, and is it working for us?"

Here's what to take away:

• Co-sleeping is an umbrella term. Room-sharing, sidecar sleeping and bed-sharing each carry different levels of risk.

• The WHO champions keeping mothers and babies together. Room-sharing on a separate surface for at least the first six months is the arrangement every major body supports.

• Bed-sharing risk is driven by circumstances. Sofas, alcohol, drugs, smoking, prematurity and soft bedding are the big dangers.

• McKenna's breastsleeping research shows that for a breastfeeding mother and healthy full-term baby in a hazard-free bed, the picture is very different from the scary headlines.

• Whatever you choose, make your bed safe for the nights you didn't plan for.

If you'd like help building a sleep arrangement that feels safe, works for your whole family, and helps everyone get more rest, I'd love to support you.

👉 Book a private consultation for a personalised plan built around your baby, your feeding goals and your family values.

👉 Join the membership for gentle guidance, expert tools, and support from a village that truly gets it.

👉 Grab the Safe Sleep and Optimal Sleep Environment Guide for a step-by-step safe sleep checklist you can use tonight.

FAQs About Co-Sleeping

Is co-sleeping with a newborn safe?

Room-sharing with your newborn on their own firm, flat surface is the arrangement every major health body supports. Bed-sharing in the newborn period needs the most care, because the first four months are the most vulnerable window for SIDS. If you are breastfeeding, your baby was born full term, and no hazards are present (no smoking, alcohol, drugs, sedating medication, sofas or soft bedding), the Academy of Breastfeeding Medicine says the evidence does not show that bed-sharing causes SIDS. If any hazard is present, your newborn should sleep on their own surface next to your bed.

Why are doctors against co-sleeping?

Most doctors are not against closeness. They are against unsafe sleep, and the simplest public health message is "never bed-share". Organisations like the American Academy of Pediatrics take this position because most sleep-related deaths in a shared bed involve hazards like alcohol, smoking or sofas, and blanket advice is easier to communicate. Other bodies, including the Academy of Breastfeeding Medicine and The Lullaby Trust, prefer a harm-reduction approach that gives families the information to bed-share more safely.

Do babies who co-sleep wake up more?

Often, yes, but it is not as bad as it sounds. Breastfed babies who bed-share spend more time in lighter sleep and feed more often overnight, which supports milk supply and keeps them easy to rouse. Mothers who bed-share tend to wake briefly and fall back to sleep quickly, so many get more total sleep even though the wakes are more frequent. If the wakes have become hourly and exhausting, that is a sign the pattern needs some support.

Can I sleep train my baby while co-sleeping?

Yes. Sleep training is really about changing sleep patterns and associations, and it can be done gently whether your baby sleeps in your bed, beside your bed or in their own room. Many families start by moving the first stretch of the night into a cot or sidecar, then work on the feed-to-sleep pattern step by step while staying close and responsive.

Does co-sleeping cause separation anxiety?

There is no good evidence that it does. A 2023 study of over 900 preschoolers found that children who were anxious or having night terrors were more likely to end up in their parents' bed, but bed-sharing did not cause later anxiety or sleep problems. Secure attachment grows from responsive care, wherever your child sleeps.

Is it okay to co-sleep with a 2-year-old?

Yes, if it is working for your family. Once your child is past their first birthday, SIDS is no longer the main concern, so toddler co-sleeping becomes a question of sleep quality and family preference rather than safety. Use a bed with no gaps your toddler could slip into and no risk of falls, and if everyone is sleeping poorly, it is completely okay to make a gentle change.

Is room-sharing the same as co-sleeping?

Room-sharing is one type of co-sleeping. It means your baby sleeps on their own surface, such as a bassinet or cot, in your bedroom. Bed-sharing, where your baby sleeps in your bed, is a different type of co-sleeping with a different risk profile. Room-sharing for at least the first six months is recommended by the American Academy of Pediatrics and the NHS.

References

Barry, E. S., & McKenna, J. J. (2022). Reasons mothers bedshare: A review of its effects on infant behavior and development. Infant Behavior and Development, 66, 101684. https://doi.org/10.1016/j.infbeh.2021.101684

Bartick, M., Young, M., Louis-Jacques, A., McKenna, J. J., & Ball, H. L. (2022). Bedsharing may partially explain the reduced risk of sleep-related death in breastfed infants. Frontiers in Pediatrics, 10, 1081028. https://doi.org/10.3389/fped.2022.1081028

Blair, P. S., Ball, H. L., McKenna, J. J., Feldman-Winter, L., Marinelli, K. A., Bartick, M. C., & the Academy of Breastfeeding Medicine. (2020). Bedsharing and breastfeeding: The Academy of Breastfeeding Medicine Protocol #6, Revision 2019. Breastfeeding Medicine, 15(1), 5-16. https://doi.org/10.1089/bfm.2019.29144.psb

Blair, P. S., Sidebotham, P., Pease, A., & Fleming, P. J. (2014). Bed-sharing in the absence of hazardous circumstances: Is there a risk of sudden infant death syndrome? An analysis from two case-control studies conducted in the UK. PLoS ONE, 9(9), e107799. https://doi.org/10.1371/journal.pone.0107799

Child Safeguarding Practice Review Panel. (2020). Out of routine: A review of sudden unexpected death in infancy (SUDI) in families where the children are considered at risk of significant harm. Department for Education, UK.

Marakovitz, S. E., Sheldrick, R. C., Copeland, W. E., Restrepo, B., Hastedt, I., Carpenter, K. L. H., McGinnis, E. W., & Egger, H. L. (2023). Associations of preschool reactive bed-sharing with sociodemographic factors, sleep disturbance, and psychopathology. Child and Adolescent Psychiatry and Mental Health, 17, 62. https://doi.org/10.1186/s13034-023-00607-w

McKenna, J. J., & Gettler, L. T. (2016). There is no such thing as infant sleep, there is no such thing as breastfeeding, there is only breastsleeping. Acta Paediatrica, 105(1), 17-21. https://doi.org/10.1111/apa.13161

Moon, R. Y., Carlin, R. F., Hand, I., Task Force on Sudden Infant Death Syndrome, & Committee on Fetus and Newborn. (2022). Sleep-related infant deaths: Updated 2022 recommendations for reducing infant deaths in the sleep environment. Pediatrics, 150(1), e2022057990. https://doi.org/10.1542/peds.2022-057990

The Lullaby Trust. (2026). Bed-sharing and co-sleeping: The research. The Lullaby Trust, London.

Wolf, R. L., Skobic, I., Pope, B. T., Zhu, A., Chamas, H., Sharma, N., Larsen, K. M., Bright, H. S., IV, & Haynes, P. L. (2025). Mother-infant bed-sharing is associated with increased breastfeeding: A systematic review. Breastfeeding Medicine, 20(4), 205-218. https://doi.org/10.1089/bfm.2024.0060

World Health Organization & UNICEF. (2018). Implementation guidance: Protecting, promoting and supporting breastfeeding in facilities providing maternity and newborn services: The revised Baby-friendly Hospital Initiative. World Health Organization.