At 9 months, a typical infant will demonstrate certain skills and growth markers known as milestones.
Growth milestones for children - 9 months; Childhood growth milestones - 9 months; Normal childhood growth milestones - 9 months
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
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
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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