All babies have their own timetable, but you can watch for certain developments in your 4-month-old. Celebrate with your baby as she reaches or nears these milestones.


  • Begins to distinguish full range of colors (blue and red seem to be favorites)
  • Interested in more complex patterns
  • Distance vision improves to about 20/40 (able to see people and objects across the room, but still prefers looking at people close-up)
  • Tracks quickly moving objects with eyes
  • Tracks an object from one side to the other (180 degrees) when held 6 inches above her face
  • Attention span increases
  • Discovers cause and effect
  • Begins to discover object permanence (an object is still there even when it can’t be seen, such as a toy dropped on the floor)


  • Holds head steady without support when held upright in your arms or on your lap
  • When on tummy, pushes up to elbows and arches back
  • May rock on tummy, waving arms and legs
  • May be able to roll from tummy to back
  • Coordinates hands and eyes (sees an object, then reaches for it)
  • Brings objects to mouth with good accuracy
  • Uses hands to explore body; may grab feet when lying on back
  • Grasps a rattle when held against fingers
  • Pushes legs down when held over a firm surface


  • Uses different cries to express hunger, pain, sleepiness, and boredom
  • Listens carefully to your language patterns and copies sounds
  • Babbling begins to sound more like real language
  • First laugh
  • May begin making more complex, two-syllable babbles that combine vowels and consonants (“ah-goo,” “bah-bah”)


  • Watches faces closely; makes and maintains eye contact
  • Copies some facial expressions and movements, such as frowning and smiling
  • Expresses happiness upon seeing you
  • Can be soothed by your presence and voice when upset
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