When does an infant typically triple its birth weight?

Infants generally triple their birth weight by around 12 months of age. At birth, an average infant weighs about 7.5 pounds, and by the end of the first year, a healthy infant typically weighs approximately 22-23 pounds. This significant growth is a normal part of development, as the infant's body undergoes rapid changes in size and muscle mass during the first year of life.

The period of rapid weight gain is most prominent in the first few months, but it gradually slows down after the initial six months. By the age of 6 months, infants usually have doubled their birth weight. However, it is by the end of the first year—around 12 months—that they have typically tripled their birth weight, reflecting not only the physical growth but also the increase in nutritional needs and developmental milestones achieved in that time frame.