At what age should an infant's weight typically double their birth weight?

Infants typically double their birth weight by the time they reach 4 to 6 months of age. This growth milestone is significant as it indicates that the infant is feeding well and gaining adequate nutrition, which is crucial for their development during the early months of life.

The growth rate in the first few months is quite rapid. During this period, infants may gain about 5 to 7 ounces per week. By the age of 4 to 6 months, most infants not only have doubled their weight but are also achieving other developmental milestones, such as improved head control and the beginnings of social engagement. Hence, reaching this weight milestone by 4 to 6 months is an important aspect of monitoring an infant's health and growth.