Parents of twins and multiples face a genuinely distinct set of sleep space decisions, and the research on whether babies should share a crib or sleep separately reveals genuinely more nuance than a simple binary answer.
The Official Safety Guidance
The American Academy of Pediatrics recommends that each multiple have their own separate, firm, flat sleep surface, a guidance that applies equally to twins, triplets and higher order multiples alongside singleton infants. This recommendation carries particular weight for multiples specifically, since many are born preterm or at low birth weight, both factors independently associated with elevated SIDS risk, making careful adherence to safe sleep practices especially important during the earliest months.
What Co-Bedding Research Actually Shows
A New Zealand study surveying parents of twins found co-bedding, placing both babies in the same cot, was genuinely popular, practiced by 52% of twin pairs at six weeks of age, declining to 31% by four months and 10% by eight months. The researchers explicitly stated they neither advocate for nor warn against co-bedding given a genuine lack of definitive data on its risks or benefits, a position echoed by professional nursing organizations that similarly decline to take a firm stance either way given the current evidence base.
Why Movement Changes the Calculation
Safety guidance is considerably clearer once a baby begins rolling or moving independently within the cot, since two babies sharing a surface at this stage face a genuine risk of rolling onto each other, potentially blocking an airway or contributing to overheating. This developmental milestone, rather than a fixed calendar age, represents the point at which separate sleep spaces become a clear safety necessity rather than simply a matter of parental preference.
Making Room Sharing Work for Two Babies
- Position two separate cribs or bassinets on opposite sides of the room where space allows, reducing the chance that one baby's stirring wakes the other
- Consider a sound machine placed between the two sleep spaces, since babies generally do learn to sleep through each other's normal nighttime noises over time
- Set up separate daytime napping spaces when possible, since sleep pressure runs naturally lower during the day, making twins more prone to disturbing each other's naps than nighttime sleep
- If space genuinely limits you to one crib in the bedroom, consider alternating which parent sleeps in the nursery, or keeping connecting doors open to maintain the spirit of room sharing
The Bond Persists Without Shared Sleep
Parents often worry that separate sleep spaces will undermine the closeness twins share, yet safe sleep guidance and genuine twin bonding can coexist comfortably, since the powerful connection between multiples develops through countless shared daytime experiences rather than nighttime proximity alone. Following current safety recommendations protects both babies without requiring parents to sacrifice the practices that support that bond during waking hours.
The takeaway: Twins and multiples benefit most from separate, firm sleep surfaces within a shared bedroom, and while co-bedding remains a personal choice in the earliest weeks given inconclusive research, movement milestones mark a clear point where separate spaces become the safer path forward.