Table of development periods

From Wikipedia, the free encyclopedia

This is an overview table of the periods in human development.

Note the difference between the reached age and the age number, which is one more. For instance, a newborn is 0 years old during the 1st year.

Different sources may have various definitions, but the outline below is generally accepted.

Age, approximately			Period
Reached age		Nr
0-9	Weeks/Week of gestational age	1-10	Prenatal development		Human embryogenesis
10 - birth		11 - birth			Human fetal development
0	days/day	1	infancy		neonate/newborn[1]
1-2		2-3
3-6		4-7
1	weeks/week	2
2-3		3-4
4-5		5-6
6-7		7-8
2	months/month	3
3		4
4		5
5		6
6-7		7-8
8-9		9-10
10-11		11-12
12-17		13-18
1.5	years/year	2.5	childhood	Early childhood	toddlerhood
2		3				Preschooler
2.5		3.5
3		4			play age
3.5		4.5
4		5
4.5		5.5
5		6
6		7		Middle childhood
7		8			School age
8		9
9		10
10		11			preadolescence
11		12
12		13	Adolescence		puberty
13		14
14		15
15		16
16		17
17		18
18		19
19		20	Adulthood		Young adult
39		40
40		41			Middle age [2]
59		60
~65		~65			Old age
various		various
various		various	Death

[edit] See also

• Child development stages

[edit] References

v • d • e Human development: biological - psychological - Overview table Pre- and perinatal Prenatal development • Pre- and perinatal psychology Infancy Infant and child development (stages) • Infancy Childhood Child development (stages) Toddlerhood • Preadolescence Adolescence Youth development • Puberty Adulthood Early adulthood • Middle adulthood • Late adulthood • Ageing & Senescence Theorists-theories John Bowlby-attachment • Erik Erikson-psychosocial • Sigmund Freud-psychosexual • Lawrence Kohlberg-moral • Jean Piaget-cognitive • Lev Vygotsky-cultural-historical