Glossary of Sleep-related terms



Sudden Infant Death Syndrome (SIDS, Crib Death)

The sudden and unexpected death of an apparently healthy infant, whose death remains unexplained after an adequate postmortem investigation. Death usually occurs during sleep. SIDS is the leading cause of death in infants in their first year of life, with the peak occurrence at 2 - 4 months. Although the majority of SIDS victims do not have identifiable risk factors, groups of infants at a somewhat higher risk include siblings of SIDS victims and infants born to substance-abusing mothers.1