Growth milestones for children - 9 months; Childhood growth milestones - 9 months; Normal childhood growth milestones - 9 months; Well child - 9 months
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 most often reached the following milestones:
- Gains weight at a slower rate, about 15 grams (half an ounce) per day, 1 pound (450 grams) 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 goodbye
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.
American Academy of Pediatrics website. Recommendations for preventive pediatric health care. www.aap.org/en-us/Documents/periodicity_schedule.pdf. Updated October 2015. Accessed January 29, 2019.
Feigelman S. The first year. In: Kliegman RM, Stanton BF, St. Geme JW, Schor NF, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 10.
Marcdante KJ, Kliegman RM. Normal development. In: Marcdante KJ, Kliegman RM, eds. Nelson Essentials of Pediatrics. 8th ed. Philadelphia, PA: Elsevier; 2019:chap 7.