I'll tell you the normal value first: under normal circumstances, a-level sperm should be >; 25%, A+B should be >; 50%, otherwise you need to pay attention to weak sperm; Sperm density below 20 million/ml (that is, 20 million/ml) is oligozoospermia; Normal sperm should be above 70%, and more than 40% dead sperm will affect pregnancy. There are many reasons that can affect semen quality, such as 1, urogenital infection, orchitis complicated with mumps, epididymal tuberculosis, varicocele and so on. 2, the use of hormones or some chemical drugs, such as anticancer drugs, reserpine, medullin, furans and so on. , can make sperm immature; 3. External radiation; 4, scrotal local long-term high fever, long-term alcoholism (especially high-concentration liquor), smoking; 5, immunosuppression, endocrine disorders and other factors, so I suggest that you'd better combine your own situation, don't blindly use drugs, and check the seminal plasma biochemistry and semen cytology as soon as possible, and make clear your own cause and condition before active treatment. I wish you the best of health!