First Time User? Sign Up Now
Home > Health Library > Sudden infant death syndrome (SIDS)
Sudden infant death syndrome (SIDS) is the death of a baby who is younger than 1 year old without a known cause. Typically, a parent or other caregiver puts the baby—who seems healthy—down to sleep and returns later to find the baby has died.
No one is at fault when a baby dies of SIDS: it can be neither predicted nor completely prevented. A baby's death is not considered a case of SIDS when a specific cause is discovered, such as carbon monoxide poisoning. By definition, SIDS is considered the cause of a baby's death only when the death remains unexplained, even after a thorough investigation.
SIDS is also known as sudden unexpected infant death (SUID).
Placing babies on their backs when putting them down to sleep reduces the risk of SIDS.
Current as of: August 22, 2019
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & John Pope MD - Pediatrics & Kathleen Romito MD - Family Medicine & Susan C. Kim MD - Pediatrics
To learn more about Healthwise, visit Healthwise.org.
© 1995-2020 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.