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Testosterone is a steroid hormone from the androgen group and is found in humans and other vertebrates. In humans and other mammals, testosterone is secreted primarily by the testicles of males and, to a lesser extent, the ovaries of females. Small amounts are also secreted by the adrenal glands.It is the principal male sex hormone and an anabolic steroid.n average, in adult males, levels of testosterone are about 7â8 times as great as in adult females. As the metabolic consumption of testosterone in males is greater, the daily production is about 20 times greater in men. Females are also more sensitive to the hormone. Testosterone is observed in most vertebrates.
This family of steroid hormones can be grouped into the sex-hormones and adrenal hormones. The sex hormones include the estrogens (estradiol, estrone, and estriol), progesterone, and testosterone. The adrenal hormones include DHEA and cortisol. Estrogen and testosterone. Estrogens are known as the female sex hormones and testosterone as the male sex hormone. While both estradiol and testosterone in fact have a wide variety of functions in both sexes, women in their youth have about ten times more estrogen than men, and men have about 10 times more testosterone than women.