Glossary

Term · Support, Home, and Village

bed-sharing

Also: co-sleeping, cosleeping, sleeping together

Sleeping in the same bed as a baby. Health groups advise against it for infants, and the risk is higher on soft surfaces, with alcohol, or after smoking.

In plain words

Bed-sharing means a baby sleeps on the same surface as one or more adults or other children. Many families do it, often while nursing at night. The American Academy of Pediatrics advises against bed-sharing for infants, and it is one of the factors linked to . The risk is higher with soft bedding, pillows, or a gap between the mattress and the wall. It is also higher after alcohol, sedating medicine, or smoking, and for babies born early or small. Some professionals distinguish bed-sharing from , where the baby sleeps in the parents' room on a separate, safe surface. The American Academy of Pediatrics recommends room-sharing on a separate surface. The word co-sleeping is often used for both, which can blur the difference.

The deeper version

Bed-sharing is the sharing of a sleep surface with an infant. The AAP's 2022 policy statement (Moon and colleagues, Pediatrics, 2022) advises against it in all circumstances and advises room-sharing without bed-sharing for at least the first six months. Case-control studies, including the NICHD Study of Sudden Unexpected Infant Deaths, show elevated risk of sudden unexpected infant death in bed-sharing infants, particularly in the early weeks and with risk factors such as parental smoking, alcohol, and soft surfaces. Most bed-sharing families do not experience an infant death, so absolute risk is low for most, but the relative risk signal is consistent. The distinction between bed-sharing and co-sleeping, used loosely in popular writing, matters for both research and counseling.

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Sources

  • American Academy of Pediatrics — SIDS and Other Sleep-Related Infant Deaths: Updated 2022 Recommendations for a Safe Infant Sleeping Environment (Moon and colleagues), Pediatrics, 2022
  • NICHD — Study of Sudden Unexpected Infant Deaths (case-control design), National Institute of Child Health and Human Development

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