Columbia Encyclopedia, testosterone is the principal androgen, or male sex hormone. Although it is a male sex hormone, it is also produced in a small amount in women. Testosterone is necessary in the fetus for the development of male external genitalia. The levels of testosterone increase at the time of puberty; therefore, contributing to the further growth of male genitalia, and for the development and maintenance of male secondary sex characteristics, such as facial hair and voice changes.

Effects of Testosterone

Testosterone is the most important male sex hormone as it helps in the production of sperm and helps in the production and maintenance of masculine characteristics such as a deep voice, strong muscles. It also helps to increase libido in order to heighten a man's sexual satisfaction. Without a doubt, it is the hormone that every man wants. Low levels of testosterone can negatively affect a man's sexual drive,...
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