Sperm are produced in the testes and are found primarily in the testes and epididymis. Sperm are produced in the male testes, where the epithelial spermatogenic cells of the seminiferous tubules, which are found in the testicular lobules, are the main cells that produce sperm. After sperm are produced, they continue to mature in the epididymis and are expelled from the body through the vas deferens when the urge to ejaculate occurs. The sperm combines with an egg cell to produce a fertilized egg, which gives birth to a new life. If you are having problems with long-term infertility, consider a routine semen test to further clarify the cause. Long-term smoking, drinking, late nights and fatigue are all prone to decreased sperm vitality, so pay attention to moderate exercise in general to increase your personal fitness. If the sperm is abnormal, go to the hospital for treatment in time to avoid adverse consequences.