An infant weighed 8 lb at birth and was 18 inches in length. What weight and length should the infant be at 5 months of age?
a. 12 lb, 20 inches
b. 14 lb, 21.5 inches
c. 16 lb, 23 inches
d. 18 lb, 24.5 inches
ANS: C
Infants gain 680 g (1.5 lb) per month until age 5 months, when the birth weight has at least doubled. Height increases by 2.5 cm (1 inch) per month during the first 6 months. Therefore, at 5 months the infant should weigh 16 lb and be 23 inches in length.
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