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Although there is a wide range of normal ages, females typically begin the process of puberty around age 10½; males at ages 11½—12. Puberty generally ends between 15—17 for females and 16–17 for males. [1] [2] [3] Females attain reproductive maturity about four years after the first physical changes of puberty appear. [13]
For example a Korean study in 2011 showed an overall average age of 12.7, with around 20% before age 12, and more than 90% by age 14. [5] A Chinese study from 2014 published in Acta Paediatrica showed similar results (overall average of age 12.8 in 2005 down to age 12.3 in 2014) and a similar trend in time, but also similar findings about ...
Testosterone levels in males and females ; Total testosterone Stage Age range Male Female Values SI units Values SI units ; Infant: Premature (26–28 weeks) 59–125 ng/dL: 2.047–4.337 nmol/L
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 ...
Adrenarche occurs starting at the age of 6 years. [4] [5] After the first year of life, the adrenal glands secrete very low levels of adrenal androgens. [1] Adrenarche begins on average between age 5 to 8 in girls and between 7 and 11 in boys, and precedes puberty by about 2 years.
Puberty starting earlier in girls and boys Research from 2020 shows that the average age of starting puberty for girls has decreased by about three months each decade from 1977 to 2013.
Puberty usually begins around ages 10—11 in females and around ages 11—12 in males. [7] Body weight and nutrition status is evidenced to have an effect on puberty onset as well, due to some input from adipose tissue hormonal signaling. [8] Puberty involves both the processes of gonadarche and adrenarche. [6]
However, a recent study of men ages 20 to 44 suggested the following ranges were more accurate based on different age groups: 20-24 years old: 409-558 ng/dL 25-29 years old: 413-575 ng/dL