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.