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Children's Health

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Milestones for a 1-Year-Old - Topic Overview

Children usually progress in a natural, predictable sequence from one developmental milestone to the next. But each child grows and gains skills at his or her own pace. Some children may be advanced in one area, such as language, but behind in another, such as sensory and motor development.

Milestones usually are categorized into five major areas: physical growth, cognitive development, emotional and social development, language development, and sensory and motor development.

Physical growth and development

Most children by age 1:

  • Have grown a total of about 10 in. (25 cm) in length since birth and measure somewhere between 28 in. (71 cm) to 32 in. (81 cm). Somewhere between 9 and 12 months of age, many babies have tripled their birth weight. After their first birthday, babies start gaining weight and growing at a slower pace.
  • Have grown in head circumference (the measurement around the top of the head). The head circumference of most babies is 18 in. (46 cm). The soft spots, or fontanelles, of the skull have started closing. But they won't completely grow together until sometime between the 9th and 18th month.
  • Still have a "baby" look. Your child's head is large in proportion to the rest of his or her body. His or her tummy sticks out, which can add to an overall "chubby" appearance.
  • Get a few teeth. Usually, the first to come in are the two front upper and lower teeth. See a picture of the typical order that baby teeth come in camera.gif.

Thinking and reasoning (cognitive development)

Most children by age 1:

  • Are curious about everyday objects and how they work. Your child may try turning knobs, pushing buttons, and opening drawers and cupboards.
  • Start to remember things that happened a few hours or even a day ago. Your child may show this new skill by doing a simple thing, such as stacking blocks or getting excited when you talk about going to the store.
  • Can find an object that they watch you hide. For example, if your child watches you cover a teddy bear with a blanket, he or she can "find" the teddy bear by removing the blanket.
  • Like to play peekaboo.
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