But if sperm count is borderline, an illness might render you infertile for a time. Obtain an adequate diet, including enough protein, essential fatty acids, and, if necessary, digestive aids. Pay special attention to selenium deficiency as a factor in male infertility. Strictly adhering to a gluten-free diet has enabled some men, who previously thought they were sterile, to become fathers. They can shut down the pituitary gland and throw the body's hormonal system out of balance.
Athletes often have fertility problems.
Long-time use of steroids can permanently damage the testicles. Drinking alcohol reduces sperm count in men. Do not overheat the testes. If you do, they will produce sterile sperm for several hours or up to a day afterward. The testes must remain a half degree cooler than your core body temperature.