The examination items of male semen include the following: 1. routine semen examination, including semen volume, pH value, liquefaction time, sperm density, vitality, activity rate, malformation rate, sperm malformation index, malformed sperm index, etc. 2. seminal plasma biochemical examination, including seminal plasma alpha-glucosidase, seminal plasma fructose, seminal plasma acid phosphatase, etc. 3. seminal plasma immunological examination, mainly including anti-sperm antibodies. 4. seminal plasma Infection index examination, mainly including seminal plasma leukocyte count, mycoplasma, chlamydia, etc. 5. Sperm function tests, such as sperm acrosome enzyme activity, sperm hypotonic swelling test, etc.