Add Yahoo as a preferred source to see more of our stories on Google. When should a child wave goodbye or start to talk? The CDC has made changes to its list of child developmental milestones. (Photo: ...

Dr. Paul Lipkin specializes in Neurodevelopmental Disabilities and Developmental and Behavioral Pediatrics at the Kennedy Krieger Institute in Baltimore, where he directs medical outpatient services.

Terms like "child development milestones" can cause anxiety in some parents. It's natural to compare your child's skills to the ones of children around their age, but doing so rarely yields good ...