Babies go through so much change in the first year. Sometimes it can feel that they change in a day! One of the biggest challenges can be understanding why sleep patterns change during this time, especially given when they're not sleeping, neither are you. Fran Chavasse is the author of The Tresillian Sleep Book and says it's much easier to ride the waves of sleep deprivation when you know what to expect. Fran outlines the general development of sleep in the first year.