Skip to main content Skip to navigation
We care about your privacy. Read about your rights and how we protect your data. Get Details

Sudden Infant Death Syndrome (SIDS)

Key Points About SIDS

  • Sudden infant death syndrome (SIDS) is the sudden and unexplained death of an infant younger than age 1. It is most common between 2 and 4 months old.

  • Researchers don't know the exact causes of SIDS.

  • There is no way to tell which babies will die from SIDS.

  • Most babies who die of SIDS have 1 or more risk factors.

  • There are many possible risk factors. These include having the baby around cigarette smoke, placing the baby to sleep on a soft surface or  co-sleeping with parents or siblings.