Sudden Infant Death Syndrome (SIDS) is the diagnosis given for the sudden death of an infant under one year of age that remains unexplained after a complete investigation, which includes an autopsy, examination of the death scene, and review of the symptoms or illnesses the infant had prior to dying and any other pertinent medical history. Because most cases of SIDS occur when a baby is sleeping in a crib, SIDS is also commonly known as crib death. SIDS is the leading cause of death in infants between 1 month and 1 year of age. Most SIDS deaths occur when a baby is between 1 and 4 months of age. African American children are two to three times more likely than white babies to die of SIDS, and Native American babies are about three times more susceptible. Also, more boys are SIDS victims than girls.