Generally speaking, if the sperm vitality is lower than about 20%, the chances of conception will be reduced, but as for the completely unable to get pregnant most of them are patients with necrospermia. Under normal circumstances, if a man’s sperm vitality reaches 32% or more, then the probability of normal pregnancy is relatively large; if it is below 32%, then the chances of pregnancy will gradually decrease; if it is below 20%, clinically diagnosed as weak spermatozoa, is required to continue to review the quality of semen. If the pregnancy is below 20%, then it is also necessary to regularly review the child’s growth and development to rule out fetal development. There are many reasons for the reduced sperm viability in men, such as sedentary lifestyle, prostatitis, kidney deficiency, and vesiculitis. It is recommended to do physical exercise and take medication under doctor’s advice to help the sperm return to normal vitality value and improve the probability of pregnancy.