Androgenetic alopecia is a type of hair loss that is inherited from
either or both the mother and the father. Also known as male- or female-pattern
hair loss, it is the most common cause of hair loss.
The condition occurs when the growth (anagen) phase of the hair
growth cycle becomes shorter and shorter. A genetic sensitivity to androgens, a
type of hormone, causes hair follicles-where hair growth begins-to sprout hairs
that are thinner than normal. The hairs become thinner and thinner, and
eventually the follicles die away.
- In men, hair loss occurs on the front hairline
and forehead and on the top of the head. Bald spots are noticeable.
- In women, hair loss occurs as thinning of hair throughout the
entire scalp, including the top and sides. Women do not generally have bald
spots but rather have overall thinning hair.
