Developmental milestones are physical or behavioral signs of development or maturation of infants and children. Rolling over, crawling, walking, and talking are considered developmental milestones and provide important information regarding the child's development. The milestones are different for each age range.
Jennifer K. Mannheim, CPNP, private practice, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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