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Insights and explainers for everyday caregiving decisions
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What Are the Main Stages of Child Development From Birth to 2?
From birth to age 2, children move through early infancy, later infancy, early toddlerhood, and the second year as skills build across movement, language, social, and feeding domains.
Key signals
The main stages of child development from birth to age 2 are early infancy, later infancy, early toddlerhood, and the second year of life. Across these stages, babies and toddlers build skills in movement, communication, social interaction, learning, and feeding; CDC milestone tools and AAP age-and-stage guidance help parents track what most children can do by a given age and act early if concerns arise. | Use CDC developmental milestone resources to track development from early infancy and act early when something concerns you.
What Is Child Development, and Why Does It Matter Early?
Child development is how babies and toddlers build skills in movement, communication, learning, social connection, and daily life.
Key signals
Child development is the way children grow and gain skills across areas such as movement, communication, learning, play, and relationships. In the first years, tracking development matters because milestone patterns can help families notice progress, support everyday learning, and act early if they have concerns. | Track development from early infancy using CDC milestone resources designed to help families notice skills and act early when concerned.
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Each insight synthesizes caregiver questions with public health guidance. For authoritative references, visit Topics.