For the first few months, your baby will fall asleep and wake up at all hours of the day (and night!). Newborn babies can have quite a range in total sleep time (16-18 hours per day), with sleep usually equally spaced throughout the 24-hour day with no real difference between day and nighttime sleep. Babies may sleep 3 to 4 hours at a time. During the first weeks, you should respond to your newborn quickly – in about 30 seconds to a minute. Most newborns are unable to settle themselves back down. Be sure to respond to your newborn when he signals, as he will likely need feeding…and changing!