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  2. Preadolescence - Wikipedia

    en.wikipedia.org/wiki/Preadolescence

    Being prepubescent is not the same thing as being preadolescent. Instead, prepubescent (and sometimes child) is a term for boys and girls who have not developed secondary sex characteristics, [15] while preadolescent is generally defined as those ranging from age 9 to 12 years. [16] Preadolescence may also be defined as the period from 10 to 13 ...

  3. Puberty - Wikipedia

    en.wikipedia.org/wiki/Puberty

    Two of the most significant differences between puberty in females and puberty in males are the age at which it begins, and the major sex steroids involved, the androgens and the estrogens. Although there is a wide range of normal ages, females typically begin the process of puberty around age 10½; males at ages 11½—12.

  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. Tanner scale - Wikipedia

    en.wikipedia.org/wiki/Tanner_scale

    Due to natural variation, individuals pass through the Tanner stages at different rates, depending in particular on the timing of puberty.Among researchers who study puberty, the Tanner scale is commonly considered the "gold standard" for assessing pubertal status when it is conducted by a trained medical examiner. [5]

  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. Child development stages - Wikipedia

    en.wikipedia.org/wiki/Child_development_stages

    Boys typically begin to grow thick facial hair; Good overall relationship with family; Begins to see parents as human beings instead of authority figures; Friendships highly important, may have a wide circle of friends of both sexes; Many teenagers at this age are starting to drive on their own. Many teenagers at this age get their first jobs.

  8. Child development - Wikipedia

    en.wikipedia.org/wiki/Child_development

    Some differences are seen in fluid reasoning and visual processing, as until about the age of four girls outperform boys in tests of these skills, but by about six or seven boys and girls score similarly. This is also true of IQ tests where girls tend to outscore boys, but again, as they age the gap lessens. [109]

  9. Precocious puberty - Wikipedia

    en.wikipedia.org/wiki/Precocious_puberty

    [18] While more girls are increasingly entering puberty at younger ages, new research indicates that some boys are actually starting later (delayed puberty). [ 21 ] [ 22 ] "Increasing rates of obese and overweight children in the United States may be contributing to a later onset of puberty in boys, say researchers at the University of Michigan ...