Rhythmicity Some babies' bodies function as if they were primed by an inner clock. You can almost predict just when they'll get hungry, soil their diapers, or need a nap. Other babies are more unpredictable. They wake erratically or want to be fed on a flexible schedule. Their bowel movements, too, may be sporadic.
Some babies wake and coo while waiting to nurse or have their diaper changed.
Others wake screaming with hunger. Similarly, some babies take a tumble while learning to walk and just pick themselves up and continue. Other toddlers sprawl and yowl with indignation. Knowing how your baby typically responds will help you gauge whether her crying means slight distress or a severe problem. Adaptability Sooner or later, infants experience an initially stressful event, such as being left with a new child-care provider.