The androgenic alopecia or in other words, male pattern baldness, in women is entirely caused by the genes.
In men, for the hair loss not to occur, the patient must have a pair of dominant balding genes. If one dominant gene coexists with a recessive gene, then the hair loss in men is very likely.
If women, on the other hand, have one dominant and one recessive genes at the same time, estrogen has a suppressive effect, and male pattern baldness does not occur. In order for Androgenic alopecia to occur in women, two recessive genes must exist at the same time. Then the suppressive influence of the estrogen is not valid anymore, and the risk of getting male pattern baldness increases in female patients.