Baby's Developmental Milestones for the First Year

Find out which baby developmental milestones you can expect to see during the first year

By the end of month eleven a baby typically:

  • Says "ma-ma" and "da-da" discriminately
  • Understands "no"
  • Claps hands
  • Waves bye-bye

 By the end of month twelve a baby typically:

  • May take one to two naps daily
  • Triples birth weight and is 29 to 32 inches long
  • Bangs two cubes together
  • Puts objects into containers and then takes them out
  • Voluntarily lets objects go
  • Shakes head "no"
  • Has fun opening and closing cabinet doors
  • Crawls well
  • "Cruises" furniture
  • Walks with adult help
  • Says "ma-ma" and "da-da"
  • "Dances" to music
  • Interested in books and may identify some things
  • May understand some simple commands
  • Fearful of strangers
  • Shares toys but wants them back
  • May form attachment to an item
  • Pushes away what he doesn't want
  • Prefers to push, pull and dump items
  • Pulls off hat and socks
  • Understands use of certain objects
  • Tests parental responses to behavior
  • Extends arm or leg when getting dressed
  • Identifies self in mirror


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