An infant born weighing 7 lb (3.18 kg) is expected to weigh approximately how much at 6 months?

• A. 12 lb (5.44 kg).
• B. 14 lb (6.35 kg).
• C. 17 lb (7.71 kg).
• D. 21 lb (9.53 kg).

Answer: (B)

Infants typically double their birth weight by about 4 to 6 months. With a birth weight of 7 lb (3.18 kg), doubling gives about 14 lb (6.36 kg). So at 6 months, an expected weight is around 14 lb. The other options are either less than double the birth weight or more than double for this age, making them less likely estimates for a healthy 6-month weight.