how old is an infant

An infant is generally defined as a very young child from birth up to about 1 year of age. The exact age range can vary, but most experts agree that an infant is a baby from birth until they reach around 12 months old. Before this stage, a baby may be referred to as a newborn, which typically lasts from birth to around 2-3 months of age. After infancy, the child is typically called a toddler, starting around age 1 year and lasting until around 3 years old.