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HORMONAL CONTROL OF BALDNESS

The cure for baldness—a common but unpopular quirk of nature—has been the subject of much investigation over many years. Now, as a result of advances in our understanding of androgen metabolism in the skin, prevention and treatment of this condition may be close at hand. Baldness is the progressive miniaturization of the long, terminal scalp hair into fine vellus hair.' The process occurs gradually over many years, affecting only certain follicles in the frontal, parietal and temporal scalp, in predisposed men and women. The miniaturization process is accompanied by (and related to) a progressive shortening of the anagen growth phase. With advancing baldness, as the follicle becomes smaller, the percentage of anagen hair decreases and that of telogen hair increases.2 There is no reduction in the number of hair follicles until the late decades of life.' In men, the process results in the familiar bald pate with a persisting