Separate sleep spaces for babies: what the evidence says

Newborn · Sleep · Reviewed 20 June 2026 · All articles

Where a baby sleeps is one of the most consequential decisions new parents make, and also one of the most contested. Safe sleep guidance from major health organisations consistently recommends a separate, firm sleep surface in the same room as the parents, yet sleeping arrangements vary enormously across cultures and families.

This article explains what the evidence says about separate infant sleep spaces, what guidelines from the AAP, NHS, Red Nose Australia, and the German paediatric society recommend, and how to think about the practical realities of setting up a safe sleep environment for your newborn.

Why a separate sleep surface matters

The core concern driving safe sleep recommendations is sudden infant death syndrome (SIDS) and sleep-related infant death caused by accidental suffocation or overlay. The risk is highest in the first six months of life and is significantly elevated when a baby shares a sleep surface with an adult, particularly on a soft mattress with loose bedding, pillows or duvets.

The American Academy of Pediatrics (AAP) updated its safe sleep guidelines in 2022 and continues to recommend that babies sleep on a separate, dedicated sleep surface rather than sharing the adult bed. The reasoning is straightforward: adult mattresses are generally softer than infant mattresses, adult bedding creates entrapment and suffocation hazards, and a baby at the edge of an adult bed can roll or be rolled onto by an adult.

A dedicated crib or bassinet that meets current safety standards - with a firm, flat mattress and a well-fitting sheet as the only covering near the baby - removes those hazards. The infant mattress is designed to be firm, reducing the risk of the baby's face sinking into the surface. There is no loose bedding to cover the baby's face. The sides of the cot prevent rolling off.

Room-sharing without bed-sharing is specifically highlighted as beneficial by the AAP and NHS. Having the baby in the same room as the parents, but on their own sleep surface, is associated with a reduced risk of SIDS compared with the baby sleeping in a completely separate room. This arrangement also makes night feeds and monitoring easier without introducing the risks of bed-sharing.

AAP and NHS guidance at a glance

The AAP's 2022 safe sleep recommendations cover the key elements of a safe sleep environment. Babies should sleep on their back for every sleep until they are one year old. The surface should be firm and flat - never on a bouncer, swing, car seat, or inclined surface. The sleep space should be free of soft objects, loose bedding, bumpers, pillows, positioners and toys. The AAP recommends room-sharing for at least the first six months and ideally for the full first year.

The NHS guidance in the UK closely mirrors the AAP on these fundamentals. The NHS recommends placing a baby in a cot or Moses basket in the same room as the parents for the first six months, day and night. The NHS also specifically warns against falling asleep with a baby on a sofa or armchair, which carries a significantly higher risk than even bed-sharing on a mattress.

Both bodies highlight additional risk factors that make any sleeping arrangement more dangerous: parental smoking (including by either parent, even if they do not smoke in the same room as the baby), recent alcohol consumption or sedating medication, extreme parental fatigue, and the baby having been born prematurely or with a low birth weight.

Red Nose Australia, the leading charity on infant safe sleep in Australia, follows the same core recommendations and uses the phrase "safe sleeping" to describe the full set of practices: back to sleep, own safe sleep space, face uncovered, smoke-free environment, and safe room temperature.

The German paediatric society's approach

The German Society for Paediatrics and Adolescent Medicine (Deutsche Gesellschaft fur Kinder- und Jugendmedizin, DGKJ) aligns closely with international guidance on separate infant sleep. The DGKJ recommends that newborns and infants sleep in a dedicated cot or crib positioned in the parents' bedroom - referred to in guidance as a separate Schlafgelegenheit (sleep space) for the baby.

The DGKJ advises placing the baby on their back on a firm, flat mattress with a well-fitting fitted sheet, without pillows, loose blankets, sheepskins, or soft positioners. The DGKJ specifically recommends against bed-sharing and notes that the risk is substantially higher when either parent smokes or when the family has a sofa or waterbed as their sleeping surface.

A practical feature of many German nurseries and parent bedrooms is a standardised travel cot (Reisebett) or wooden cot placed directly beside the parental bed. Bedside cribs that attach to the adult bed have also become popular in recent years as a way of keeping the baby close for night feeds while maintaining a separate surface.

The DGKJ approach reflects a broader cultural emphasis in German paediatric practice on clear, evidence-based guidelines communicated through the Kinderarzt (paediatrician) at regular Vorsorgeuntersuchung check-ups. Parents receive safe sleep information from the hospital at birth and reinforced at the U2 check-up, typically carried out at three to ten days of life.

Cultural variation and why it matters

It is worth acknowledging that separate infant sleep is not universal. In Japan, the traditional practice of kawa no ji - sleeping with a baby between two parents, shaped like the kanji for river - remains common. In many parts of South and East Asia, bed-sharing is the norm rather than the exception. Anthropologists have noted that in the majority of human cultures throughout history, infants have slept physically close to or on a caregiver.

Proponents of co-sleeping in these traditions point to easier breastfeeding, fewer disruptions to parental sleep, and the ease of responding to an infant during the night. Some researchers have studied whether breastfeeding mothers show heightened physiological awareness of their infant's position during sleep, though neither the AAP nor the NHS considers this evidence robust enough to alter the overall recommendation.

Understanding cultural variation helps families from different backgrounds navigate guidance that may conflict with what their own parents or grandparents consider normal. The goal is not to dismiss those traditions but to understand the specific risk factors that make some sleeping arrangements more dangerous than others - and to make adjustments that reduce those risks as far as possible in any given context.

Setting up a safe separate sleep space

A practical crib or cot for a newborn should have a firm, flat mattress that fits snugly with no gaps at the sides. The only covering next to the baby should be a well-fitting fitted sheet. A baby sleeping bag designed for the correct weight range of the infant is a safe and convenient alternative to blankets and is recommended by the NHS and the Lullaby Trust as it cannot ride up over the baby's face.

The crib should be placed away from radiators and direct heat sources, and away from windows to reduce draughts. The room temperature recommended by the NHS and DGKJ is between 16 and 20 degrees Celsius. A simple room thermometer is a useful way to monitor this without guesswork.

Bedside cribs that attach or sit flush against the adult bed have grown significantly in popularity. These allow a parent to lift the baby quickly for night feeds without fully waking or leaving the bed, and return the baby to their own surface afterwards. They are generally considered a safe and practical compromise between the closeness of co-sleeping and the separate sleep surface recommended by all major health bodies.

If using a Moses basket for the first weeks, check that it has a firm, flat mattress and that the basket itself is placed on a stable flat surface rather than a stand that could tip. Moses baskets are generally not designed for babies over a certain weight and should not be used once the baby can roll or push up with their arms.

Frequently asked questions

What does the AAP recommend for newborn sleep?

The AAP recommends that babies sleep on their back, on a firm and flat surface, in their own separate crib or bassinet that meets current safety standards. The sleep space should be free of soft bedding, pillows, bumpers and toys. The AAP advises room-sharing without bed-sharing for at least the first six months and ideally for the first year.

What is the DGKJ's position on infant sleep?

The German Society for Paediatrics and Adolescent Medicine (DGKJ) recommends that babies sleep in their own separate sleep space - a crib or cot placed in the parents' bedroom. The DGKJ advises against bed-sharing and recommends placing babies on their back on a firm, flat mattress without loose bedding for the first year of life.

Is room-sharing without bed-sharing actually safer than a separate room?

Yes. Research cited by the AAP and NHS finds that room-sharing without bed-sharing is associated with a lower risk of SIDS compared with the baby sleeping in a completely separate room. Having the baby close by makes it easier to respond to their needs and to monitor them during the night, while keeping them on a separate safe sleep surface removes the risks associated with bed-sharing.

When can a baby move to their own room?

The AAP recommends room-sharing for at least the first six months and ideally for the first year. After that point, moving a baby to their own room is considered safe if the sleep environment meets safe sleep guidelines - firm, flat surface, no loose bedding, on their back. Both the NHS and the DGKJ follow broadly similar timelines, though guidance varies slightly by country. Always discuss with your health visitor or paediatrician if unsure.

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