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Developmental milestones record - 4 months

Alternative names

This article describes the skills and growth markers relevant to 4 month-old infants.


Physical and motor:

  • Weight gain slows to approximately 20 grams per day
  • Moro reflex , asymmetric tonic neck reflex, rooting reflex, and Perez reflex disappearing
  • Almost no head lag while in a sitting position
  • Able to sit straight up if propped
  • Able to raise head 90 degrees when placed on stomach
  • Able to roll from back to one side
  • Tries to reach objects with hands, but commonly overshoots
  • Plays with rattle when placed in hands, but unable to pick it up if dropped
  • Grasps rattle with both hands
  • Able to place objects in mouth
Sensory and cognitive:
  • Close vision well established
  • Eye-hand coordination beginning
  • Can make the consonant sounds:
    • N
    • K
    • P
    • G
    • B
  • Laughs out loud
  • Anticipates feeding when able to see a bottle (if bottle-fed)
  • Begins to show memory
  • Demands attention by fussing
  • Place the baby in front of a mirror
  • Provide bright colored toys to hold
  • Repeat sounds the infant makes
  • Help the infant roll over
  • Use a swing or stroller

Update Date: 4/15/2003

Elizabeth Hait, M.D., Department of Pediatrics, Rainbow Babies and Children's Hospital, Case Western Reserve University, Cleveland, OH. Review provided by VeriMed Healthcare Network.

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Last updated: Tue, 06 Jan 2009 00:20:03 GMT