👉 In the context of human development, infancy refers to the period from birth until about two years old. During this time, a child is born into a world of new experiences and needs, with much to explore and learn. The infant's brain and body are still developing, allowing them to experience the world around them in ways that adults cannot. This stage of development is crucial for a child's overall growth and socialization, as well as their ability to adapt to life outside of infancy.