Let me just say if you are going to get a hair transplant, research, research, research and remember post surgery care is crucial, I learned that the hard way. If you are prone to hair loss, steroids will most likely accelerate it, there are ways to help prevent hair loss without HT too.
Minoxidil, Finasteride, Duta... just please research these extensively too, they can have some serious side effects (albeit very unlikely according to the statistics) also worth investigating oral vs topical of the above, topical fin and duta are potentially game changers.