Child Development Timeline


9 to 10 Month Developmental Milestones
Humans pick up on language beginning in the fetal stage and usually say their first word around age 10 months.
Humans pick up on language beginning in the fetal stage and usually say their first word around age 10 months.
Duangkamon Khattiya/Getty Images

9 MONTHS OLD

Growth

  • Gains 12g/day, 13oz/month
  • Length inc. 1.2 cm/month

Movement and Activity

  • Grasps object between thumb and forefinger ("pincer grasp")

Cognitive

  • Will search for an object when it is taken away, understands that it exists even though it can no longer be seen ("object constancy")

Communication

  • Single syllable "words" ("ma", "da")
  • Understands "no"
  • Inflection with babbling

10 MONTHS OLD

Growth

  • First molars erupt

Movement and Activity

  • Sits up alone and indefinitely
  • Crawls on hands and knees
  • Crawls up stairs
  • Walks while holding on to furniture (cruising)
  • Walks with two hands held

Cognitive

  • Understands simple phrases
  • Follows simple directions
  • Associates "mama" with mother and "dada" with father
  • Can find objects by name when asked

Social/Emotional

  • Waves
  • Plays "peek-a-boo"
  • Tests autonomy (crawls away from mother and checks for her reaction)

Communication

  • First "real" words ("mama", "baba")
  • Conversational babbling

More to Explore