See full list on drugs. com. Hereditary-pattern baldness is the most common cause of hair loss. hereditary-pattern baldness is not really a disease, but a natural condition caused by some combination of genetics, hormone levels and the aging process. almost all men and women will notice hair loss or hair thinning as they age. however, up to 40% of men and women will experience a more obvious form of this condition. hair loss typically begins in the 20s and 30s, although in women the changes are most noticeable after meno The exact cause of au is unknown. au is an advanced form of alopecia areata (aa), a condition that leads to round patches of hair loss. alopecia genetic the most widely accepted hypothesis is that aa is an autoimmune condition in which a person's immune system mistakenly attacks the hair follicles. The inheritance pattern of androgenetic alopecia is unclear because many genetic and environmental factors are likely to be involved. this condition tends to cluster in ...