At 9 months, a typical infant will have certain skills and reach growth markers called milestones.
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 has usually reached the following milestones:
- Gains weight at a slower rate, about 15 grams (half an ounce) per day, 1 pound per month
- Increases in length by 1.5 centimeters (a little over one-half inch) 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
- Sits for long periods
- Pulls self to standing position
- Reaches for objects while sitting
- Bangs objects together
- Can grasp objects between the tip of the thumb and index finger
- Feeds self with fingers
- Throws or shakes objects
SENSORY AND COGNITIVE SKILLS
The 9-month-old typically:
- Has separation anxiety and may cling to parents
- 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 help the 9-month-old develop:
- Provide picture books.
- Provide different stimuli by going to the mall to see people, or to the zoo to see animals.
- 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.
- Sing songs together.
- Avoid television time until age 2.
- Try using a transition object to help decrease separation anxiety.
Growth milestones for children - 9 months; Childhood growth milestones - 9 months; Normal childhood growth milestones - 9 months
Feigelman S. The first year. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 8.
Update Date 12/2/2014
Updated by: Sameer Patel, MD, MPH, Assistant Professor in Pediatrics, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.