10 factors leading to male infertility

　　1. Environmental impact: Miners and boiler workers who overheat in tunnels; underwear that is too tight; excessive smoking and drinking; and hypoxia can all affect fertility.

　　2. Reproductive organ infection: Bacteria, viruses, protozoa and other infections can directly damage the testicles, seriously affecting spermatogenesis and reducing sperm production. sperm activity leading to infertility. For example, 20% of cases of mumps in early puberty may be complicated by orchitis, causing infertility.

　　3. Testicular abnormalities: There are three types of testicular abnormalities: ① Cryptorchidism, which not only causes infertility, but also induces malignant transformation;② fetus The embryonic primordium is damaged due to adverse environmental factors in the early stage; ③ Early testicular damage can be caused by birth trauma during delivery.

　　4. Chromosomal abnormalities: such as hermaphroditism, abnormal reproductive organs, etc.

　　5. Acquired testicular damage: such as hernia repair, hydrocele surgery, testicular fixation surgery, etc., damage the testicular blood vessels, hinder the blood supply and cause testicular atrophy.