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→Start of Puberty: Add text and citation.
Females usually start puberty at about 10.5 years of age, and males start about a year later.
===Precocious puberty===
Puberty sometimes starts early. When it does, it is called precocious puberty.
Puberty that starts before eight years in girls and nine years in boys is considered to be precocious puberty.
==Onset of sexual function==
Menstruation usually occurs at about 12.5 years of age, while first ejaculation usually occurs at about 13 years of age.
If a boy's [[foreskin]] has not become retractable prior to puberty, then it will almost certainly become retractable during puberty.<ref name="Øster1968">{{OesterJ 1968}}</ref> <ref name="kayaba1996">{{REFjournal
|last=Kayaba
|init=H
|last2=Tamura
|init2=H
|last3=Kitajima
|init3=S
|etal=yes
|title=Analysis of shape and retractability of the prepuce in 603 Japanese boys
|journal=J Urol
|volume=156
|issue=5
|pages=1813-1815
|url=http://www.cirp.org/library/normal/kayaba/
|quote=
|pubmedID=8863623
|pubmedCID=
|DOI=
|date=1996-11-01
|accessdate=2025-09-28
}}</ref> <ref name="agarwal2005">{{REFjournal
|last=Agarwal
|first=
|init=A
|author-link=
|last2=Mohta
|first2=
|init2=A
|author2-link=
|last3=Anand
|first3=
|init3=RK
|author3-link=
|etal=no
|title=Preputial retraction in children
|trans-title=
|language=
|journal=J Indian Assoc Pediatr Surg
|location=
|date=2005-04
|season=
|volume=10
|issue=2
|article=
|pages=89-91
|url=https://journals.lww.com/jiap/fulltext/2005/10020/preputial_retraction_in_children.5.aspx
|archived=
|quote=
|pubmedID=
|pubmedCID=
|DOI=10.4103/0971-9261.16468
|accessdate=2025-09-28
}}</ref>
==Tanner stages==
Dr James Tanner, a British paediatric endocrinologist, created Tanner stages, which describes the progress of puberty through five stages.<ref name="cleveland2024">{{REFweb
|url=https://my.clevelandclinic.org/health/body/puberty
|title=Puberty
|last=Anonymous
|first=
|init=
|author-link=
|publisher=Cleveland Clinic
|date=2024-08-26
|accessdate=2025-09-28
}}</ref>
==End of puberty==
Puberty typically lasts for 2 to 5 years. It usually ends for girls at age 15 to 17, and for boys at age 16 to 17.<ref name="cleveland2024" />
{{LINKS}}
* {{URLwikipedia|Puberty|Puberty}}
{{REF}}