Editing Development of the human body (section)

===Infancy and childhood===
{{Main|Infant|Child development|Child development stages}}
'''Childhood''' is the age span ranging from birth to [[adolescence]].<ref name="Students Macmillan 1981 page 173">''Macmillan Dictionary for Students'' Macmillan, Pan Ltd. (1981), page 173. Retrieved 2010-7-15.</ref> In [[developmental psychology]], childhood is divided up into the developmental stages of [[toddle]]rhood (learning to walk), [[early childhood]] (play age), middle childhood (school age), and adolescence (puberty through post-puberty). Various childhood factors could affect a person's attitude formation.<ref name="Students Macmillan 1981 page 173"/>

*Prepubescence 
** Neonate (newborn) 
**[[Infant]] (baby) 
**[[Toddler]] 
**[[Early childhood|Play age]] 
**[[Elementary school]] age, may coincide with [[preadolescence]] (preteen)
[[File:Child development stages.svg|thumb|center|800px|Approximate outline of development periods in [[child development]]]]

The [[Tanner stages]] can be used to approximately judge a child's age based on physical development.

{| class="wikitable" 
|- 
! For North American, Indo-Iranian (India, Iran) and European girls 
! For North American, Indo-Iranian (India, Iran) and European boys 
|- 
|  
*[[Thelarche]] (breast development) <br>age 10½ (8–13) 
*[[Pubarche]] (pubic hair) <br>age 11 (8½–13½) 
*Growth spurt <br>age 11¼ (10–12½) 
*[[Menarche]] (first menstrual bleeding) <br>age 12½ (10½–14½) 
*Wisdom tooth eruption<br>age 15½ (14–17)
*Adult [[Human height|height]] reached <br>age 15½ (14–17) 
|  
*[[Gonadarche]] (testicular enlargement) <br>age 11½ (9½–13½) 
*[[Pubarche]] (pubic hair) <br>age 12 (10–14) 
*Growth spurt <br>age 13 (11–15) 
*[[Spermarche]] (first ejaculation) <br>age 13 (11–15) 
*Wisdom tooth eruption <br>age 17 (15–19)
*Completion of growth <br>age 17 (15–19) 
|}