Female androgenetic alopecia has many different types and is a big problem that most doctors can not imagine.
Coefficients of androgenetic alopecia in women is physical heredity and hormonal environment. It is not necessary the abnormal hormone levels to express the inheritance . The patterns of inheritance evolve over time . This can happen in a long time, so that can be observed at an early age but can occur as a woman reaches maturity.
The androgenetic alopecia in women occurs in ~ 25% of women in middle age (35-40 years) .