HSC M2 Human growth and development Arba Dreni D1-1.1: outline the life stages of human growth and development. Life stages are the different phases of life that all individuals go through. These are infancy, childhood, adolescence and adulthood. Each stage is divided into smaller ones, for example early childhood and late childhood. These stages are not fixed and can vary from culture to culture. Infancy- infancy is from birth to two years. During this time the baby grows and develops a ...