In early childhood, growth charts are used to monitor the height, weight and head circumference, serving as a screening tool to identify physical development. During this window of time, between early ...

This piece is part of Scientific American's column The Science of Parenting. For more, go here. One study of children with achondroplasia found that 100 percent of them commando crawled when they ...

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.