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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.
The sleep charts that you see in parenting books and websites are based on how much time parentsâtypically, Western parentsâsay their babies spend sleeping. For instance, studies of Australian babies reveal that the average newborn gets about 16-17 hours of sleep over a 24-hour period.f course, not all of this sleep time occurred at night. One-month-old babies slept an average of 8 hours each night, with 96% of babies getting between 6 and 13.3 hours of nighttime sleep. At 3 months, babies spent more time sleeping at nightâ-10 hours, on average.