A 7-month-old infant was born with a birth weight of 3 kg. At a routine visit, the infant weighs 6 kg. The child is active and feeding well. What is the most appropriate interpretation of this growth pattern?
A
Normal growth because weight doubles at 1 year
B
Failure to thrive because birth weight should have doubled by 5–6 months
D
Suggestive of endocrine disease