Figure 2. Hyperandrogenism in women. An excess of androgens causes hirsutism and, in severe cases, virilization. Hirsutism involves the presence of hair that does not normally appear in women, such as a mustache. Virilization includes male-pattern baldness, coarsening of the voice, a decrease in breast size, an increase in muscle mass, loss of female body contour, and enlargement of the clitoris.