To determine the quality of sperm, the main way of examination is semen routine, which mainly looks at the volume of semen, density of sperm, sperm deformity rate, sperm vitality and so on. 1. Semen volume: the normal volume of semen is 2-6 ml, and anything less than 2 ml or more than 6 ml is abnormal. 2. Sperm density: it reflects the spermatogenic function of testis and indicates that the density of sperm is 20 million/ml. if it is less than 20 million/ml, it can be considered as oligospermia. 3. Sperm abnormality rate: the abnormality rate of sperm is less than 96% is normal, if it is more than 96%, it can be considered as dyszoospermia. 4. Sperm vitality: it is an important indicator of sperm, which is judged by the forward movement of sperm, i.e. the sperm rate of A-grade sperm and B-grade sperm, which is greater than 50% if normal, and consider weak spermatozoonosis if it is less than 32%. To summarize, sperm quality can be assessed by tests such as semen routine. If semen disorders are present, medical attention should be sought promptly.