Ah, I probably should have mentioned that I am female
Thanks for the reply.
My hands are a bit large and they could probably belong to a dainty boy but I think my hands and feet are mostly feminine. I know my ribs won't shrink down, but it's definitely possible for the muscles that make the abdomen, shoulders and legs bulky to get smaller. But the testosterone, or my sensitivity to it, has been maintaining it. People's hormones change and for better or worse, intentional or not, they gain or lose muscle. I'm just wondering what role estrogen has in this, and how supplemental estrogen might differ.

My hands are a bit large and they could probably belong to a dainty boy but I think my hands and feet are mostly feminine. I know my ribs won't shrink down, but it's definitely possible for the muscles that make the abdomen, shoulders and legs bulky to get smaller. But the testosterone, or my sensitivity to it, has been maintaining it. People's hormones change and for better or worse, intentional or not, they gain or lose muscle. I'm just wondering what role estrogen has in this, and how supplemental estrogen might differ.