Homeostasis and hormones
Changes occur at puberty because of sex hormones produced by the testes in boys, and the ovaries in girls. Some changes happen to everyone, both boys and girls, while others happen in one sex only.
Here are some changes that happen to both boys and girls:
Here are some changes that happen to boys only:
Here are some changes that happen to girls only:
Fertility in humans can be controlled by the artificial use of sex hormones, including contraceptive pills and fertility drugs.
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