Which statement about infancy growth spurts is true?

• A. Birth weight quadrupled by 6 months.
• B. Birth weight is doubled by 4 to 6 months.
• C. Birth weight remains the same for the first year.
• D. Birth weight triples by 6 months.

Answer: (B)

Infancy is a period of rapid weight gain, especially in the first half-year. By about four to six months, a healthy baby typically doubles their birth weight, reflecting strong feeding and overall growth during this time. After this milestone, growth continues, and by about one year many babies have tripled their birth weight. The other ideas don’t fit the usual pattern: quadrupling by six months would require an unrealistically fast rate of growth, weight remaining the same in the first year is not consistent with normal development, and tripling by six months occurs earlier than commonly expected.