Androgens were formerly thought of as the "male sex hormones," but now we know that they have an important role in women as well, even though women's levels are much lower than men's. In women, androgens have more than 200 cellular actions, including helping maintain a healthy sex drive, preventing fatigue and contributing to a woman's overall sense of well-being. They also prevent bone loss and bone disease and play a role in the formation of estrogen.