How do prostate infections cause infertility?
Since the ejaculatory duct passes through the prostate gland, infections of the prostate can cause swelling and block off part of the reproductive tract that passes through the prostate. This can also stop sperm from being ejaculated. Because the prostate and seminal vesicles contribute most of the fluid to the ejaculate, a blockage near the prostate can sometimes reduce the volume of ejaculate. Infections of the prostate and seminal vesicles can also cause inflammatory cells to pass into the ejaculate, which may damage the sperm. Very rarely, a man may have a congenital abnormality (a problem they have been born with) in which lumpy growths or ‘cysts’ in the prostate gland have formed. These cysts can also cause blockage of sperm at this level.