【英语时差8,16】女人掉头发（在线收听）

 When you think of hair loss you probably think of men, unless that is, you are one of the twenty million women in the U.S. who suffer from hair loss. Though hair loss in men is a common subject for television commercials as well as fodder for television sitcoms, women's hair loss is so stigmatized it's hardly talked about at all.   The most common form of hair loss in women is Androgenetic Alopecia or what is known as female pattern baldness. It accounts for over ninety-five percent of incidents of hair loss in women. And like male pattern baldness it has a large genetic predisposition, and it involves androgen and DHT. Androgen is a male hormone that all men and women produce. Androgen in turn produces a chemical called dihydrotestosterone, more easily remembered as DHT. DHT in excess causes hair follicles to make thinner and thinner hair until they eventually stop making hair altogether.