Science Fair Project Encyclopedia
Categories: Developmental biology | Pediatrics | Sexuality and age
Gonadarche
Gonadarche refers to the earliest gonadal changes of puberty. In response to pituitary gonadotropins, the ovaries in girls and the testes in boys begin to grow and increase the production of the sex steroids, especially estradiol and testosterone.
In boys, testicular enlargement is the first physical sign of gonadarche, and usually of puberty.
In girls, ovarian growth cannot be directly seen, so thelarche and growth acceleration are usually the first evidence of gonadarche.
Gonadarche should be contrasted with adrenarche. Gonadarche indicates that true central puberty has begun, while adrenarche is an independent maturational process only loosely associated with complete puberty.
Categories: Developmental biology | Pediatrics | Sexuality and age
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details