- Male pattern baldness otherwise known as Androgenic Alopecia is  responsible for over 98% of all hair loss in men. It gets its name from the pattern of hair loss, which ultimately results in a horseshoe of hair that resides on the sides and back of the head ( leaving a donor area for modern day hair transplants) while the top of the head is completely bald.

- Some men begin MPB by losing the hair in their hairline. Others start in the crown. The most familiar hair loss pattern is where the hair begins to recede in the hairline and the crown at roughly the same time. MPB is caused by genetic predisposition and Dihydrotestosterone (DHT).

- DHT is a byproduct of testosterone and shrinks hair follicles. It is present in every male. If DHT is suppressed the hair follicles will continue to thrive.

Norwood Classification of Male Pattern Baldness: