The following guideline describes the various physical, cognitive, emotional, and social developmental changes and milestones to be expected during the first year of life.
It is of utmost importance to remember that the timeline is approximate, not absolute. Each child develops at his or her own pace, and some stages may occur earlier or later.

Differences between the timing in this guideline and your child may exist, but do not necessarily mean that there is a problem with your baby's development. Any concerns, however, should be discussed with your physician.

Physical

• Movement and Activity
  • Stands alone and unsupported
  • Walks with 1 hand held
  • Drink from cup without help

Social/Emotional

• Plays alongside others, but not with others (parallel play)
• Communication
  • Uses words meaningfully

12 MONTHS OLD

Physical

• Growth
  • Weight has tripled since birth
  • Length has doubled since birth
• Movement and Activity
  • First steps
  • Feeds self with a spoon
  • Transfer object from self to other with pincer
  • Attempts to stack 2 blocks
  • Helps with dressing by adjusting posture

Social/Emotional

• Identifies self in mirror
• Communication
  • Attempts simple conversations