How Much Sleep Do Kids and Babies Need?
Know When It's Time For Bed: Here's How Much Sleep Kids and Babies Need by Age
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How much sleep they need: 12 to 15 hours, including naps.
Once a baby hits the 3-month mark, they already should prove to be a bit more alert throughout the day, taking distinct naps and sleeping through the night (the dream). That said, they still need quite a bit of shut-eye over a 24-hour period and could be sleeping up to 18 hours.