Male to Female and hair growth

What part of the process of their transition actually stops and reversed hair loss? I have heard that people who go MTF are able to regrow a full head of hair even if they started balding prior. So I’m curious. Is it the hormone blockers? And do you think that a baldness cure could come from scientists looking more into how MTF people can completely reverse their hair loss?

If you take testosterone out of the equation (chemical or surgical castration) and add estrogen, and the hair loss is recent, hair may yet grow from the balding area. The fall back position is hair transplants which is a common surgery with MTF.