<Table> <Tr> <Td> Part of a series on </Td> </Tr> <Tr> <Th> Human growth and development </Th> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Th> Stages </Th> </Tr> <Tr> <Td> <Ul> <Li> Human embryogenesis </Li> <Li> Fetus </Li> <Li> Infant </Li> <Li> Toddler </Li> <Li> Child </Li> <Li> Preadolescence </Li> <Li> Adolescence </Li> <Li> Young adult </Li> <Li> Middle age </Li> <Li> Old age </Li> </Ul> </Td> </Tr> <Tr> <Th> Biological milestones </Th> </Tr> <Tr> <Td> <Ul> <Li> Fertilization </Li> <Li> Childbirth </Li> <Li> Walking </Li> <Li> Language acquisition </Li> <Li> Puberty </Li> <Li> Menopause </Li> <Li> Ageing </Li> <Li> Death </Li> </Ul> </Td> </Tr> <Tr> <Th> Development and psychology </Th> </Tr> <Tr> <Td> <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> </Td> </Tr> <Tr> <Th> Developmental stage theories </Th> </Tr> <Tr> <Td> <Ul> <Li> Attachment </Li> <Li> Ecological </Li> <Li> Psychosocial </Li> <Li> Psychosexual development </Li> <Li> Moral </Li> <Li> Cognitive </Li> <Li> Cultural - historical </Li> <Li> Evolutionary </Li> </Ul> </Td> </Tr> <Tr> <Td> <Ul> <Li> Human body portal </Li> </Ul> </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table> <Tr> <Td> Part of a series on </Td> </Tr> <Tr> <Th> Human growth and development </Th> </Tr> <Tr> <Th> Stages </Th> </Tr>

Which of the following periods of development is sometimes referred to as the preschool years