Infant Sleep
topic
Infant sleep is characterized by high total duration (14–17 hours), polyphasic distribution across many brief periods without circadian organization (the SCN circadian clock develops over the first 3–4 months of life), and high REM proportion (up to 50% of total sleep versus 20–25% in adults) — with the high REM reflecting its critical role in synaptogenesis (neural connection formation) and brain development that makes infant sleep neurologically essential rather than merely restorative.
Role
Infant sleep science has significant practical implications for parental management — with the understanding that the fragmented, polyphasic sleep of early infancy is biologically normal rather than a problem to be 'fixed', that the high REM proportion serves essential neurodevelopmental functions that sleep training should not inadvertently reduce, and that parental sleep deprivation from infant sleep patterns is among the most severe acute sleep deprivation experiences of adult life and a significant contributor to postpartum depression and relationship conflict. Parents who understand the developmental biology of infant sleep make more informed and more sustainable sleep management decisions.