Semen is jelly-like after discharge and liquefies into a thin liquid within 30 minutes. This process is the result of the combined action of coagulation and liquefaction factors in semen, with coagulation factors mostly originating from the seminal vesicles and liquefaction factors mostly originating from the prostate. When the secretion function of the prostate gland is reduced due to various factors (such as prostatitis), abnormal semen liquefaction occurs. The spermatozoa can gain energy and movement only after the semen is expelled and liquefied. When the semen is not liquefied or is poorly liquefied, the semen is too viscous and sperm activity is restricted, in a position where they cannot move at all or partially, and their movement is mostly located in the same place, so that they cannot cross the cervix etc. and rejoin the egg, thus making it difficult to have children.