Which age range indicates proper growth in infant birth weight after one year?

An infant's growth in birth weight is typically assessed by examining weight gain during the first year of life. Within this critical growth period, it is expected that most infants will triple their birth weight by the time they reach one year of age.

From 6 to 12 months, infants continue to gain weight but at a slightly slower rate compared to the first six months. During this time, they often begin to develop new skills, such as sitting up, crawling, and perhaps even walking, all of which can influence their growth patterns. While it’s important to note that weight gain is just one indicator of an infant's overall health and development, the weight growth observed during this specific timeframe is vital for ensuring adequate nutrient intake and supporting developmental milestones.

Infants typically experience a significant increase in length and weight during the first year, but the most pronounced and rapid growth occurs in the first half of the year. By understanding that the 6-12 month range is critical for monitoring consistent growth, it becomes clear why this choice is recognized as the correct answer.