I want to caveat this by saying with the exception of a beard like the GEICO Caveman, I did not have alot of hair dor a guy. The decrease in density/growth rate of body hair was already noticable by three months HRT and fine "baby hair" at my forehead indicated some growth at my hairline.
Just over a year HRT, I no longer need to groom the fine hair on my arms (I used to run a thinning comb over them once a month).
All that remains is heavy femle pattern velum hair.
Being it's winter and no one's going to see me, I decided to stop shaving my chest a week ago to see if/how much grows back- so far nothing. But slacks or shorts, I just don't get enough growth on my legs to shave more than once a week now.
Dunno about my underarms. It''s just gross not to shave every time you take a shower.
I'm not sure about the affect on my beard as I have been doing 5 hours of electrolysis a week nearly the whole time...