Which of the following is not routinely measured in the first 2 years of life?

• A. Body mass index
• B. Length/height
• C. Weight
• D. Head circumference

Answer: (A)

In infancy, growth is tracked with measurements that reflect size, linear growth, and brain growth: weight shows overall mass, recumbent length tracks how tall the child is becoming, and head circumference monitors brain growth and skull development. Body mass index isn’t routinely used in the first two years because it doesn’t reliably indicate adiposity or health risk in infants. BMI charts are designed for older children, once height and body composition stabilize enough for BMI to be meaningful. Instead, clinicians look at weight-for-length and head circumference-for-age to assess growth and identify potential concerns.