Core concepts

Growth & Development Milestones

Developmental MilestonesDownload PDF

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Development follows predictable patterns — use them to plan age-appropriate care.

Key points

  • Birth weight roughly doubles by 6 months and triples by 12 months.
  • Object permanence develops around 9 months.
  • Toddlers engage in parallel play.

Test-taking tip: Look for the answer that protects the client first.

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