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Eight- to Eleven-Month-Olds

Ages and Stages Photo Gallery


Updated March 27, 2011

Nine-month-olds can do a lot, including being able to sit alone, pull up, stand holding on to things, jabber and imitate sounds, crawl, and wave bye-bye.
An infant starting to walk at nine months.

An infant starting to walk at nine months.

Photo (c) Juan Collado
While continuing to give 3 to 5 feedings of breast milk or an iron fortified infant formula (24 to 32 ounces) and 4 or more tablespoons of cereal, vegetables and fruit one or two times each day, you can usually start to give more protein containing foods, soft table foods, and finger foods.

Your nine-month-old will now begin to explore how things work, enjoy playing peekaboo and pat-a-cake and being read to. It is important to give lots of praise and many opportunities for exploration.

He may also begin to show separation anxiety and stranger anxiety.

What You Need To Know About Your Nine-Month-Old Infant

  • According the latest car seat guidelines, older infants should continue to ride in a rear-facing car seat (infant-only rear facing car seat or rear-facing convertible car seat) until they are two years old or until they have reached the weight and height limits of their car seat. Although this means that some larger infants and toddlers might have to graduate to a rear-facing convertible car seat, there are several models of infant only seats with higher, 30 to 35 pound weight limits that should get you to the next car seat safety milestone.
  • To prevent choking, never leave small objects or plastic bags in your baby's reach.
  • Falling televisions hazard: learn more about the 'hidden hazard' of kids getting injured from televisions falling on top of them and how to secure your furniture and TV so that your kids are safe.
  • Learn if you need a carbon monoxide detector in your home to keep your family safe from carbon monoxide poisoning.
  • At the nine-month checkup, you can expect a complete physical exam, a review of feeding and sleep schedules, measurement of your child's height, weight and head circumference, and immunizations, including HepB if the third dose was not given already. Screening tests, including a blood level to check for anemia and screening questionaire for lead poisoning risk, will also likely be done.
  • Common Infant Problems

Nine-Month-Old Infant Topics

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