Patients with necrospermia often have no obvious symptoms of discomfort, and usually consult the doctor because the couple has normal sex life for one year after marriage but fails to get pregnant. Such patients are usually diagnosed on the basis of routine semen tests, and the diagnosis can be confirmed if more than three consecutive routine semen tests reveal that the viability of sperm is below 60%, or the rate of dead sperm is greater than 40%, or more than 50% of sperm is dead within one hour after sperm discharge, and more than 70% of dead sperm is dead after six hours. Since most of the dead spermatozoa are related to spermatogenic defects, or varicocele, prostatitis, epididymitis, even if there is discomfort, it is often a manifestation of chronic prostatitis, epididymitis, seminal vesiculitis, as well as varicocele.