Medicine & USMLE

9 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

By 9 months of age, infants develop the gross motor abilities of crawling, and can pull themselves up to stand. They also develop the fine motor ability of holding objects with a 3-finger pincer grasp. In terms of cognitive abilities, 9 month old infants turn and orient to their names, and also search for hidden objects due to the development of object permanence.

Key Points

  • 9 Months
    • Gross motor
      • Crawls
      • Pull to stand
      • Cruises (walks holding onto furniture)
    • Fine motor
      • Inferior/3-finger pincer grasp
      • Claps
    • Language
      • May start saying simple words and performing simple gestures, although this is more commonly experienced by 12 months
    • Social/Cognitive
      • Object permanence
        • Searches for hidden objects
        • They now know that once an object disappears from view it still exists
      • Responds to name