Normal development in a child such as crawling or walking is a developmental milestone. Each period of growth in a child is marked by developmental milestones up until the adolescent years.
Review Date 2/2/2021
Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.