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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.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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Phone: (603) 742-5252
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