If you choose to use the side sleep position, make sure your baby's lower arm is forward to stop him or her from rolling over onto the stomach. If you have any questions about your baby's sleep position or health, first talk to your doctor or nurse. SIDS, sometimes known as crib death, is the major cause of death in babies from 1 month to 1 year of age. Most SIDS deaths occur when a baby is between 1 and 4 months old. More boys than girls are victims, and most deaths occur during the fall, winter and early spring months.
Death occurs quickly, usually during a sleep time.
This information is from the U.S. Public Health Service, American Academy of Pediatrics, SIDS Alliance, and Association of SIDS and Infant Mortality Programs.