Which physical finding is expected in a healthy infant at about 12 months of age?

Correct answer: C. The chest circumference is usually about equal to the head

  • A. The anterior fontanelle is usually widely open
  • B. The chest circumference is usually smaller than the head
  • C. The chest circumference is usually about equal to the head
  • D. The posterior fontanelle is usually larger than the anterior

Explanation

By about 12 months, chest circumference usually becomes approximately equal to head circumference. The posterior fontanelle normally closes much earlier, while the anterior fontanelle is narrowing or closing during this period.

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