The document outlines the major stages of human development from prenatal development through late adulthood. It describes key physical, cognitive, social, and emotional milestones at each stage. Prenatal development involves the formation of major body structures and concern for the health of the mother. Infancy and toddlerhood is a time of dramatic growth including learning to walk, talk, and imitate. Early childhood involves gaining independence and learning language and the physical world. Middle childhood focuses on school and social relationships. Adolescence brings puberty and thinking about abstract concepts. Early adulthood focuses on career and relationships. Middle adulthood is a peak time of productivity. Late adulthood shows physical deterioration and concerns about health and finances.