a receptor antagonist can not affect the hormone levels, i don't think that would even be possible. but if it was through some weird mechanism it would certainly occur after 6 month already and they did measure that in the safety trial. thats where the safety trial got its name from. you don't do larger studies without doing that first.
I wish they would measure hair diameter and weight, thats more important cosmetically than hair count, in finatsreide hair count only improves by 10% on average but hair weight by 20% and thats where the most effect comes from. I think they would get a a good result