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  2. Puberty - Wikipedia

    en.wikipedia.org/wiki/Puberty

    [9] [10] [11] Puberty that starts earlier than usual is known as precocious puberty, and puberty which starts later than usual is known as delayed puberty. Notable among the morphologic changes in size, shape, composition, and functioning of the pubertal body, is the development of secondary sex characteristics, the "filling in" of the child's ...

  3. Spermarche - Wikipedia

    en.wikipedia.org/wiki/Spermarche

    Puberty onset before the age of 9 in males is considered medically abnormal, and is defined as precocious puberty; Research on both organic and ideopathic precocious puberty in males has described puberty onset as early as nine months old, [11] [12] as semenarche has a wide range of onset within puberty (with some research indicating spermatogenesis in some cases in early pubertal development ...

  4. Adolescence - Wikipedia

    en.wikipedia.org/wiki/Adolescence

    Upper body of a teenage boy. The structure has changed to resemble an adult form. Puberty is a period of several years in which rapid physical growth and psychological changes occur, culminating in sexual maturity. The average age of onset of puberty is 10–11 for girls and 11–12 for boys.

  5. Child development - Wikipedia

    en.wikipedia.org/wiki/Child_development

    Growth then proceeds at a slow rate until a period of rapid growth occurs shortly before puberty (between about 9 and 15 years of age). [86] Growth is not uniform in rate and timing across all parts of the body. At birth, head size is already relatively near that of an adult, but the lower parts of the body are much smaller than adult size.

  6. 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.

  7. Rare condition causes baby in India to go through puberty - AOL

    www.aol.com/news/2016-05-31-rare-condition...

    Puberty typically begins during the teen or pre-teen years, but a child in India has begun to display the signs at a shockingly early age. The Hindustan Times is reporting that the boy's parents ...

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