The normal morphology of the spermatozoa should be greater than 50% or more, otherwise it will cause infertility. Activity rate of more than 50% belongs to A & B grade. According to the quality of spermatozoa can be divided into 4 grades ABCD, those with a straight and rapid forward movement should be greater than 50%. In addition, the survival rate of semen is usually checked within one hour after setting, and the survival rate should be greater than or equal to 50%. Common causes of reduced sperm motility and viability include inflammation of the paraphilic glands, varicose veins in the spermatic cord, cilia sluggishness syndrome due to chronic respiratory infections, presence of anti-sperm antibodies in the semen or improper storage of specimens. If an abnormal sperm normal rate is found, it is important to promptly investigate what causes it and treat the symptoms.