Why and how newborn babies' sleep patterns change
During pregnancy, your baby slept most of the time, with sleep cycles lasting around 40 minutes; after birth, newborns often have a period during which they are a little more awake and alert. While every baby is an individual and will have different sleep needs, all newborns have a small stomach – around the size of a walnut – so will need to wake regularly for feeds throughout the day and night.