Medicine & USMLE

18 Months

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Developmental Milestones
  1. 2 Months
  2. 4 Months
  3. 6 Months
  4. 9 Months
  5. 12 Months
  6. 18 Months
  7. 2 Years
  8. 3 Years
  9. 4 Years
  10. 5 Years

Summary

The 18 month or 1.5 year developmental milestones refer to a set of abilities that most children can perform by that age. In terms of gross motor abilities, By 18 months, most children are expected to walk well, and to begin running, climbing stairs, and jumping up and down. Children at this age can also stack 3 to 4 blocks on top of each other. By 18 months, the anterior fontanel should be completely closed.

Key Points

  • 18 months
    • Gross Motor
      • Runs
        • May take up to 2 years to develop
      • Jumps
        • May take up to 2 years to develop
      • Climbs stairs
        • May need help until around 2 years old
    • Fine Motor
      • Builds 3-4 block tower
      • Scribbles
      • Removes clothing
      • Uses cup and spoon
    • Language
      • 10-25 word vocabulary
        • Usually single word statements (no sentences)
    • Social/Cognitive
      • Temper tantrums
    • Body Development
      • Anterior fontanel closes