Sudden Infant Death Syndrome (SIDS) | American Lung Association

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Sudden Infant Death Syndrome (SIDS)

Sudden Infant Death Syndrome (SIDS) is the sudden and unexpected death of an infant less than 1 year of age from an unknown cause. SIDS remains unpredictable with an unknown cause despite years of research. Certain factors such as sleeping position and maternal smoking are associated with SIDS.

Learn About Sudden Infant Death Syndrome (SIDS)

SIDS is the leading cause of unexpected deaths in infants in developed countries. SIDS usually occurs during sleep and is thus often referred to as "crib death."

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Sudden Infant Death Syndrome (SIDS) Risk Factors

Although risk factors have been identified, the precise cause of SIDS is unknown. The risk is greatest when certain factors, such as sleeping position and maternal smoking are present.

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What Protects Babies from Sudden Infant Death Syndrome (SIDS)?

SIDS affects seemingly healthy babies. But the risk of SIDS can be greatly reduced by these protective factors.

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Tips to Reduce the Risk of SIDS

Although SIDS is unpredictable, there are steps you can take to reduce risk. The American Academy of Pediatrics recommends the following to reduce the risk of SIDS in infants.

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This content was developed in partnership with the CHEST Foundation, the philanthropic arm of the American College of Chest Physicians.

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