Human Growth and Development / Unit 3 HGD 0306 short lesson, about 20 seconds
How Much Infants Sleep
Captions available
The idea
Newborns need about fourteen to seventeen hours of sleep a day, two-year-olds eleven to fourteen, and adults seven to nine.
In practice
About half of a baby's sleep in the first year spent in REM, against a fifth to a quarter in adults.
Where people slip
Sleep is a biopsychosocial process, shaped by biology, psychology and social setting at once.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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