I am thallasemia major boy aged 28 years..i have been using testosterone 1000mg/ 3 months due to hypogandism for the past 5 years..however i have experienced very less puberty changes-low muscle mass;less facial hair; ..the only complete change i have experienced is i get alot of erections..my testosterone levels are absolutely normal after the injections treatment..i have consulted many endocronologists regarding the issue of less puberty changes but i have just been told to keep waiting & give time..