Stages in life span development: Prenatal: conception to birth Infancy: birth to 18 months Early childhood: 18 months to 6 years Middle childhood: 6 to 11 years Adolescence: 11 to 20 years Early adulthood: 20 to 40 years Middle adulthood: 40 to 65 years Late adulthood: 65+ years #SoMee #SME #someeofficial