Androgenetic hair loss
Androgenetic alopecia is the most common form of hair loss. Androgenetic alopecia is an extremely common disorder affecting both men and women. The incidence is generally considered to be greater in males than females.
Although androgenetic alopecia is a hormonal determined condition, latest information in research have shown, that in women, also other reasons may cause this type of hair loss.
An average of 47% of men under 30 years of age have androgenetic hair loss, the incidence rising with age. About 19% of women aged over 20 years are affected.
Male hair loss pattern in androgenetic alopecia
Androgenetic alopecia is caused by a genetic disposition under the influence of androgens. The catabolic product of testosterone, dihydrotestosterone, initially causes a shortening of the anagen phase, ultimately leading to advanced miniaturisation and resulting exhaustion of the hair follicle.
According to Norwood-Hamilton, androgenetic alopecia expresses itself in seven different stages, from balding at the temples to "monk's tonsure".
Female hair loss pattern in androgenetic alopecia
Female hair loss pattern starts in the parting area and spreads from there into all directions.
