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Developmental milestones record - 9 months

Definition

At 9 months, a typical infant will demonstrate certain skills and growth markers known as milestones.

Alternative Names

Growth milestones for children - 9 months; Childhood growth milestones - 9 months; Normal childhood growth milestones - 9 months

Information

All children develop a little differently. If you are concerned about your child's development, talk to your child's health care provider.

PHYSICAL CHARACTERISTICS AND MOTOR SKILLS

A 9 month old generally has reached the following milestones:

  • Gains weight at a slower rate -- approximately 15 grams per day, 1 pound per month
  • Increases in length by 1.5 centimeters per month
  • Bowel and bladder become more regular
  • Puts hands forward when the head is pointed to the ground (parachute reflex) to protect self from falling
  • Is able to crawl
  • Remains sitting for long periods
  • Pulls self to standing position
  • Has a pincer grasp between thumb and index finger
  • Feeds self with fingers
  • Throws or shakes objects

SENSORY AND COGNITIVE SKILLS

The 9 month old typically:

  • Is developing depth perception
  • Understands that objects continue to exist, even when they are not seen (object constancy)
  • Responds to simple commands
  • Responds to name
  • Understands the meaning of "no"
  • Imitates speech sounds
  • May be afraid of being left alone
  • Plays interactive games, such as peek-a-boo and pat-a-cake
  • Waves bye

PLAY

To aid the development of the 9 month old:

  • Provide picture books
  • Provide different stimuli:
    • Go to the mall (people)
    • Go to the zoo (animals)
  • Play ball
  • Build vocabulary by reading and naming people and objects in the environment
  • Teach hot and cold through play
  • Provide large toys that can be pushed to encourage walking
  • Control the type and amount of television watched

References

Feigelman S. The first year. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa: Saunders Elsevier; 2007: chap 8.


Review Date: 11/3/2008
Reviewed By: Jennifer K. Mannheim, CPNP, private practice, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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