With HRT, the younger you are when starting the better the reesults,,,,,from my understanding if you are past your thirties the results will not outweigh the health risks.....but then again, I am not a professional and would advise that you speak to a professional about it...
If you are near LOs Angeles, there is a Place called "the hamilton center" and that is what they do....and are dedicated to the transgender community.
here:
ENDOCRINOLOGY & METABOLISM
1950 Sawtelle Blvd.,
Suite 145A
Los Angeles, California 90025
(310) 481-2245 Phone
(310) 481-2226 Fax
hope this helps