I was diagnosed with a large prolactinoma which had gone undiagnosed throughout the most vital of physical of developmental periods, my teenage years. I am on testosterone .5 mil. every other day and I am losing weight but I was told my doctor that the damage has been done-the likelihood for me to father a child naturally is almost impossible. My question is, is the damage irreversible? Is it possible with the testosterone treatment to have the normal size testicles and penis-and have them working correctly without use of more pills/surgery?