Don't forget that a baby's development isn't always even. If a child has an advancement in one area, he may regress in another area, points out Dr. McCoy. For example, many children regress socially and emotionally when they begin to walk. While the child may like the new freedom that walking supplies, he also realizes that being mobile may leave him far from the comforts of Mom. As a result, he may start displaying what is commonly called separation anxiety. Another example: When a child is focusing on mastering his fine motor skills (stringing beads, grasping a crayon), he may slow down on honing various gross motor skills (walking, catching a ball), or if he is in love with motion, he may not be interested in learning how to talk.
All of these things together -- personality, environment, muscle tone, and personal preferences -- will dictate how quickly or slowly your child reaches specific developmental milestones. In the long run, even if your child is the last one on the block to roll over, he will probably be just fine. After all, wasn't it Einstein who didn't start talking until age 3?
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