2. Poor diet (malnutrition) can also contribute to male infertility, including deficiency in vitamin C and zinc in your diet, you may want to consider supplementing with volume pills to increase your fertility. Some diseases (e.g., tuberculosis, fevers, anemia, and mumps in adulthood) and infections are also suspect. These are infections of the reproductive system such as epididymitis, orchitis, and prostatitis. Some sexually transmitted disease such as chlamydia or gonorrhea also damages the spermatic ducts. You also risk transmitting your disease to your partner causing her to be infertile.
3. Some medications are also believed to be causes of male infertility.