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For babies over 6 months, the amount of nighttime sleep stayed fairly constant across agesâabout 11 hours on average, with a range of approximately 9-13 hours (Iglowstein et al 2003). Baby sleep requirements are also met by sleeping during the day.
Baby Sleep Schedules. After worrying that their newborn baby may be sleeping too much, parents often begin to wonder when their baby will begin sleeping through the night. Surprisingly, a newborn baby can sleep up to 18 hours a day, although on average, they sleep about 16 hours.