Are there any hormonal differences in general between men with male pattern baldness and men without MPB?
We know that in men, testosterone gets converted into dihydrotestosterone (DHT) and it is the 5a-reductase enzyme that converts testosterone to DHT. Some men do not have the genetics markers that cause the DHT to induce the (hair) loss, though. In other words one can have a very high DHT level and never have hair loss (because they do not have the genes for genetic hair loss).
DHT can be inhibited/ reduced with drugs like Propecia (finasteride 1mg). Although women also make testosterone (lesser amounts) the impact of Propecia does not stop or reverse genetic female hair loss as it does in most men. This suggest that women’s hair loss is not related to DHT.
With all that said… I don’t know of any specific hormonal differences between balding and hairy men.