Medicine & USMLE

4 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 four months of age, infants develop the gross motor abilities to roll from their stomachs to their back, and begin to voluntarily grasp objects in their palms. The hands of infants at 4 months should be mostly open, and persistence of fist clenching can be a sign of developmental delay. Finally, 4 month old infants begin to laugh and show signs of memory like recognizing faces and objects. 

Key Points

  • 4 Months
    • Gross Motor
      • Rolls
        • From prone
    • Fine Motor
      • Grasps objects
        • Palmar grasp
      • Holds hands in open position
    • Language
      • Laughs
    • Social/Cognitive
      • Begins to show memory
        • Remembers/recognizes faces and objects