First Time User? Enroll now.
*Vaccine availability and appointments* | Additional COVID-19 resources.
Please be aware that mask-wearing is required at all UNC Health facilities.
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't be predicted or completely prevented. A baby's death is not considered a case of SIDS when a specific cause is found, such as carbon monoxide poisoning. SIDS is considered the cause of a baby's death only when the death remains unexplained, even after a thorough review.
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: February 10, 2021
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.
© 1995-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
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.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.