Physical development between 12 and 24 months of age

Your child's physical growth during the second year, although considerable, is less rapid than during the first year. In the second year, toddlers gain an average of 3lb to 5lb and grow an average of 3in. to 5in.. Normal and expected physical growth requires adequate nutrients and a nurturing environment.

As toddlers begin to walk and become more active, they develop leaner and more muscular arms and legs and lose fat around the face and tummy. They also lose some of their baby look.

In the second year, the molars usually begin to come in. These large and flat teeth may cause your toddler pain before and while they are erupting through the gum tissue. This may cause irritability, disrupt sleep patterns, and change your toddler's behavior. For more information about tooth eruption, see the topic Teething.