The semen test is performed by a man who has been abstinent for about 3-5 days and goes to the hospital to masturbate to extract sperm, or has intercourse with a special condom, and then takes the semen to the laboratory. The laboratory professional will observe the volume, pH, and liquefaction of the semen. 1. the most important is the concentration of sperm, which is the number of sperm per milliliter of semen. 2. the motility of sperm, which is the percentage of sperm that can move forward. 3. the more important indicator is the malformation rate of sperm, which is the percentage of normal and malformed sperm. This is because generally only sperm that are able to swim forward and have normal morphology are potentially capable of fertilization. If the sperm stay put and stay inside the vagina forever, fertilization is not possible. Or if it is deformed, it is generally not able to unite with the egg for fertilization. Therefore, the semen test checks three main indicators. The DNA fragmentation rate is used to assess the degree of sperm damage and to predict the probability of miscarriage after a man has impregnated his female partner. Sperm acrosome function reflects the strength of the sperm’s ability to penetrate the egg.