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sudden infant death syndrome

The sudden, unexplained death of a baby under 1 year old, usually during sleep, where no cause is found after full investigation.

SUD-un IN-fent DETH SIN-drohm noun

What it means

A death of a seemingly healthy infant that stays unexplained after an autopsy, a review of the death scene and the health history. It is most common between 1 and 4 months of age. Risk factors include sleeping on the stomach or side, soft bedding, sharing a bed, overheating, smoke exposure and being born early. It is part of a wider group called sudden unexpected infant death (SUID).

For the nurse

Teach safe sleep for every sleep: alone, on the back, in a crib with a firm flat mattress and fitted sheet, with no pillows, blankets, bumpers or toys. Room-sharing without bed-sharing, a pacifier at sleep time, breastfeeding and a smoke-free home lower the risk. Model safe sleep in the hospital.

Remember it

ABC of safe sleep: Alone, on the Back, in a Crib.

At a glance

AbbreviationsSIDS; SUID (sudden unexpected infant death)
Spanishsíndrome de muerte súbita del lactante
Also writtenSIDS, crib death, cot death

Related terms

apnea

A pause in breathing, or breathing that has stopped.

grief

The deep emotional, physical and spiritual response to a loss, especially the death of someone close.

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