Hair thinning and hair loss has been a problem for people over the ages. In this discussion I will only address hereditary hair loss. While areas of complete hair loss are seen much more commonly in men, thinning of the hair is common with aging in both men and women. Because there has not been an adequate treatment for extensive hair loss in men, there exists an extensive industry devoted to hair transplantation, wigs and other hair substitutes. Hair loss is distressing to many men, but it is even more distressing to women, probably because hair in women plays more of a role in sexual attraction than it does in men. Also, the range of treatments for women is significantly less than for men.