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  2. Puberty - Wikipedia

    en.wikipedia.org/wiki/Puberty

    Although there is a wide range of normal ages, females typically begin the process of puberty around age 10½ and end puberty around 15–17; males begin around ages 11½—12 and end around 16–17. [1] [2] [3] Females attain reproductive maturity about four years after the first physical changes of puberty appear. [13]

  3. Tanner scale - Wikipedia

    en.wikipedia.org/wiki/Tanner_scale

    In the nearly fifty years since those studies, the ages at which children are beginning puberty has only declined: (as of 2018) "The age of puberty, especially female puberty, has been decreasing in western cultures for decades now [...] for example, at the turn of the 20th century, the average age for an American girl to get her period was 16 ...

  4. Adolescence - Wikipedia

    en.wikipedia.org/wiki/Adolescence

    Girls have usually reached full physical development around ages 15–17, [3] [11] [34] while boys usually complete puberty around ages 16–17. [11] [34] [35] Any increase in height beyond the post-pubertal age is uncommon. Girls attain reproductive maturity about four years after the first physical changes of puberty appear. [3]

  5. Study of age of puberty in girls suggests links with ... - AOL

    www.aol.com/study-age-puberty-girls-suggests...

    In girls, puberty and periods normally start between the ages of 10 to 15, but experts say this has been getting earlier in recent decades. In girls, puberty and periods normally start between the ...

  6. Why Is Puberty Starting Earlier? New Research Points To ... - AOL

    www.aol.com/lifestyle/why-puberty-starting...

    Another study, which was published in 2024, found that the average age that girls had their first periods decreased from 12.5 years old in 1950 to 1969 to 11.9 years old in 2000 to 2005.

  7. Early puberty may be linked to a common chemical used in ...

    www.aol.com/news/early-puberty-may-linked-common...

    Starting puberty significantly early — younger than age 8 in girls, 9 in boys — may have health effects lasting into adulthood, including higher risks of breast cancer, diabetes and heart disease.

  8. Delayed puberty - Wikipedia

    en.wikipedia.org/wiki/Delayed_puberty

    Puberty is considered delayed when the child has not begun puberty when two standard deviations or about 95% of children from similar backgrounds have. [7] [8] [9]In North American girls, puberty is considered delayed when breast development has not begun by age 13, when they have not started menstruating by age 15, [2] and when there is no increased growth rate. [8]

  9. Development of the human body - Wikipedia

    en.wikipedia.org/wiki/Development_of_the_human_body

    Until the maturation of their reproductive capabilities, the pre-pubertal physical differences between boys and girls are the external sex organs. On average, girls begin puberty around ages 10–11 and end puberty around 15–17; boys begin around ages 11–12 and end around 16–17.