Male Pattern Baldness is the thinning of hair on the scalp caused by a genetic deterioration of the cells responsible for producing hair known as hair follicles by the hormone DHT (dihydrotestosterone). DHT is responsible for a process known as follicular miniaturisation that causes the hair follicle to contract/shrink. As the hair follicle miniaturise the hairs produced by the hair follicle begin to thin, the number of hairs produced reduces and eventually the hair follicle ceases to produce hair at all, resulting in baldness.