I'm doing that experiment right now.. My mother is half aware of my gender stuff and while at first she was loving and accepting she turned cold fast once I told her I was thinking about stopping my testosterone HRT. I never went thought puberty so they want me to take T to get that going. When I told her that she turned far more cold hearted and paranoid. So, in an effort to help show that taking T won't help, I took one of the every 2-3 week injections, and have been recording my progress. I'm almost done with it, as it's been 3 weeks. After the first most of a week, I felt an increase in wanting to be girly, and an increase in feeling like a girl. I felt it, more clearly than ever, that inside I was a girl, not a boy. Along with it increased need to be girly, and after a bit, some depression. I was super happy and bubbly for the first week, perhaps because if anything my gender because clearer to me. After that I've had more daily depression and a few worse episodes at night. i'd not taken T in more than 2 months, and I'd gone well over a month before injection without more than minor depression. If anything to me this shows that T doesn't help at all. That said, if I told my mom the results, she would invalidate my entire effort, convincing herself that unless I did it for months so that the T dosage was normal for months at a time, the test didn't prove anything as it could be an initial reaction.
But at least the test has helped me figure myself out. ^~^