Hi welcome to H.C.M.Forum. what you are thinking might not be testosteron defeciency. whether you are asking after consultation and blood tests. or assumed by your self, i think it is former. one testis will be suffecient for maintenence. if you are defecient reason might not be single testis. you have to consult an endocrinologist, for consultation and treatment. if defecient also no problem. best of luck.

Hello,
Hope you are doing well. I would suggest you to get your serum progesterone levels to identify if there is a decrease in the levels. In most cases, more than enough hormones and sperm are produced in one healthy testicle for both a healthy sex life and the ability to fertilize eggs. however, some men with one testicle may tend to experience feelings of , loss of masculinity, or self-consciousness that can interfere with sexual functioning. So stop worrying and get a blood test. Please do write in if you happe to experience any symptoms.