whether to move forward with a medical gender transition, i.e., by combining them with gender affirming hormone therapy.

Or as UVa's Dr. Milton Edgerton, a pioneer in this area preferred to call it, gender confirming treatment.

Google Dr. Milton Edgerton gender.

And up to a certain point at least, even the effects of hormone therapy can be reversed simply by stopping it as well as any puberty blockers, and just letting nature take its course, although some effects or hormone therapy may be more permanent than others, e.g. breast mass in case of MTF, and deeper voice, a larger clitoris, scalp hair loss, and increased body and facial hair in the case of FTM.

From the link below regarding feminizing hormone therapy:

After you begin feminizing hormone therapy, you'll notice the following changes in your body over time:

- Fewer erections and a decrease in ejaculation. This will begin 1 to 3 months after treatment starts. The full effect will happen within 3 to 6 months.
- Less interest in sex. This also is called decreased libido. It will begin 1 to 3 months after you start treatment. You'll see the full effect within 1 to 2 years.
- Slower scalp hair loss. This will begin 1 to 3 months after treatment begins. The full effect will happen within 1 to 2 years.
- Breast development. This begins 3 to 6 months after treatment starts. The full effect happens within 2 to 3 years.
- Softer, less oily skin. This will begin 3 to 6 months after treatment starts. That's also when the full effect will happen.
- Smaller testicles. This also is called testicular atrophy. It begins 3 to 6 months after the start of treatment. You'll see the full effect within 2 to 3 years.
- Less muscle mass. This will begin 3 to 6 months after treatment starts. You'll see the full effect within 1 to 2 years.
- More body fat. This will begin 3 to 6 months after treatment starts. The full effect will happen within 2 to 5 years.
- Less facial and body hair growth. This will begin 6 to 12 months after treatment starts. The full effect happens within three years.

Some of the physical changes caused by feminizing hormone therapy can be reversed if you stop taking it. Others, such as breast development, cannot be reversed.