A nurse is collecting data from an infant at a well-child visit. The nurse should understand that birth weight typically doubles by what age?

A. 12 months: By 12 months, an infant’s weight typically triples, not just doubles, reflecting rapid growth in the first year. B. 9 months: While growth rates vary, doubling birth weight by 9 months is slightly later than the average developmental milestone. C. 3 months: At 3 months, most infants have gained weight but have not yet doubled their birth weight. D. 6 months: Infants generally double their birth weight by around 5 to 6 months of age, which is a key indicator of healthy growth and nutrition.