At what point can hormone therapy be reversed?
It can be reversed at any time. However, there will be some permanent effects. If a male takes estrogen for a short while before stopping, it may be possible for him to impregnate a female. After six months, most men are permanently infertile. Breast growth and facial hair growth cannot be reversed. The voice lowering in a F-M is also permanent. The skin and body changes will disappear over time.