About 1,360 babies died of SIDS in 2017, the last year for which such statistics are available. Most SIDS deaths happen in babies between 1 month and 4 months of age, and the majority (90%) of SIDS deaths happen before a baby reaches 6 months of age. However, SIDS deaths can happen anytime during a baby's first year.
Most deaths happen during the first 6 months of a baby's life. Infants born prematurely or with a low birthweight are at greater risk. SIDS also tends to be slightly more common in baby boys. SIDS usually occurs when a baby is asleep, although it can occasionally happen while they're awake.
SIDS is also the third-leading cause of death for infants up to 1 year of age. 90% of SIDS deaths occur before 6 months of age. 72% of SIDS deaths occur between months 1-4.
SIDS has no warning symptoms and can occur in seemingly healthy babies. Although SIDS can occur at any age before 12 months, it is most common when an infant is between 1–4 months old. SIDS is less common after an infant is 8 months old, but a person should still take precautions to reduce the risk.
This is because the death may happen when the baby is sleeping in a crib. SIDS is one of the leading causes of death in babies from ages 1 month to 1 year. It happens most often between 2 and 4 months old. SIDS and other types of sleep-related infant deaths have similar risk factors.
So Colvin and his colleagues studied 8,207 unexplained infant deaths in 24 states between 2004 and 2012. About 70 percent of the babies who died were three months old or younger, the researchers found.
SIDS is the leading cause of death among infants 1 month to 1 year old, and remains unpredictable despite years of research. Even so, the risk of SIDS can be greatly reduced. Most important: Babies younger than 1 year old should be placed on their backs to sleep — never on their stomachs or on their sides.
Sudden infant death syndrome (SIDS) is the unexplained death, usually during sleep, of a seemingly healthy baby less than a year old. SIDS is sometimes known as crib death because the infants often die in their cribs.