Most babies go through several growth spurts (also called frequency days) during the first 12 months. During a growth spurt, breastfed babies nurse more often than usual (sometimes as often as every hour) and often act fussier than usual. The increase in baby’s milk intake during growth spurts is temporary. Physical growth is not the only reason that babies may have a temporary need for increased nursing. Babies often exhibit the same type of behavior (increased nursing with or without increased fussiness) when they are working on developmental advances such as rolling over, crawling, walking or talking. Mom’s milk is for growing the brain as well as the body!