<Ul> <Li> Pre - and perinatal </Li> <Li> Infant and child </Li> <Li> Adolescent </Li> <Li> Youth </Li> <Li> Young adult </Li> <Li> Adult </Li> <Li> Maturity </Li> </Ul> <Li> Pre - and perinatal </Li> <Li> Infant and child </Li> <Tr> <Th> Developmental stage theories </Th> </Tr>

When was adolescence first recognized as a distinct stage of human development