The Short Answer
Sharing an adult bed with a baby under 12 months is not recommended by the American Academy of Pediatrics (AAP), the NHS, or Helsedirektoratet due to increased risk of Sudden Infant Death Syndrome (SIDS) and accidental suffocation. However, room-sharing (baby's own sleep surface in the parents' room) is strongly recommended and reduces SIDS risk by up to 50%.
What Is Co-Sleeping?
"Co-sleeping" is an umbrella term that covers two distinct practices:
- Bed-sharing: Baby sleeps in the same adult bed as a parent or caregiver — this is what safety guidelines advise against
- Room-sharing: Baby sleeps in their own safe sleep surface (cot, Moses basket, bedside crib) in the parents' room — this is actively recommended
What the Evidence Shows About Bed-Sharing Risks
Research is clear: bed-sharing significantly increases the risk of sleep-related infant death.
Key findings:
- SIDS risk increases 5-fold when a baby under 3 months shares an adult bed (Vennemann et al., BMJ 2012)
- Risk is even higher when a parent has consumed alcohol, sedating medication, or is a smoker — even if not smoking in bed
- Soft bedding, pillows, and duvets in adult beds can obstruct a baby's airway
- Sofas and armchairs are the highest-risk surface of all — never sleep with a baby on a sofa
The AAP Safe Sleep Recommendations
The AAP's 2022 Safe Sleep guidelines recommend:
- Always place baby on their back to sleep
- Use a firm, flat sleep surface (cot or Moses basket that meets safety standards)
- Keep baby's sleep area free of soft bedding, pillows, bumpers, and toys
- Room-share without bed-sharing for at least the first 6 months, ideally 12 months
- Avoid smoking during pregnancy and around baby
The NHS Position
The NHS advises against bed-sharing if any of the following apply:
- Baby was born premature (before 37 weeks)
- Baby had low birth weight (under 2.5 kg / 5.5 lbs)
- You or your partner smoke (even if not in the bedroom)
- You or your partner have consumed alcohol or medication that causes drowsiness
- You are very tired
The NHS notes that the risk is difficult to eliminate entirely even for parents who don't smoke or drink.
Safer Alternatives to Bed-Sharing
If parents want closeness without the risks of sharing an adult bed:
- Bedside bassinet/next-to-me crib: Attaches to the adult bed, providing proximity while baby has their own safe surface. These are widely available and NHS-endorsed
- Room-sharing cot: Baby's cot in the parents' room — reduces SIDS risk significantly
- Side-by-side contact naps: Supervised, awake contact where a parent lies next to baby is different from unsupervised overnight sleep
What About "Safe Bed-Sharing" Practices?
Some advocates promote structured safe bed-sharing approaches (e.g., the SAFE framework). While these reduce — but do not eliminate — risk, they are not endorsed by AAP, NHS, or Helsedirektoratet. Current evidence does not support a universally "safe" way to bed-share with infants under 12 months.
If families do choose to bed-share despite advice, harm-reduction guidance (no alcohol, no smoking, no heavy bedding, firm mattress only) can reduce — but not eliminate — risk.
Key Takeaway
Room-sharing: ✅ Strongly recommended for at least 6–12 months Bed-sharing: ⚠️ Not recommended — increased SIDS and suffocation risk
Use our Baby Sleep Tracker to log safe sleep practices and track your baby's overnight patterns.
Related Articles
- How Much Sleep Does a Newborn Need?
- How to Help Your Baby Sleep Longer
- When Should a Baby Sleep Through the Night?
Sources
- American Academy of Pediatrics (AAP) — Safe Sleep: Updated Recommendations (2022)
- NHS — Sudden infant death syndrome (SIDS)
- World Health Organization (WHO) — Child mortality and cause of death
- Helsedirektoratet — Krybbedød og trygg søvn