ABSTRACT
Permanent hair loss is thought to be due to, in large part, the testosterone me tabolite, dihydrotestosterone (DHT). D H T acts to “turn off” genetically sensitive follicles. These follicles are located in predictable patterns, usually the frontal or frontoparietal scalp, and this hair loss is termed male pattern baldness. The follicles in the occipital and parietal regions of the scalp serve as the donor areas for restora tion surgery. A balding person has on average between 5000 and 6000 follicles avail able for hair donation, having lost up to 30,000 follicles.
