Sleep Pattern Development from 6 Through 33 Months

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Abstract
Children's sleep patterns, as recorded through parent diaries, were examined from 6 through 33 months of age. Total sleep per 24 hours and number of transitions between sleep and wakefulness declined with age, while longest periods of sleep and wakefulness increased. Total sleep and longest period of sleep were found to be stable individual characteristics over time. No sex differences were found in rate or stability of sleep pattern development.