正常人类精液射出后具有凝固并在短时间液化的特点。精液刚射出时呈稠厚的胶冻状,有利于射精后在女性阴道中停留,而随后的精液液化有利于精子运动。精液这一变化特征是哺乳类和灵长类动物在繁衍后代过程中自然选择的结果。一般认为,精液凝固与液化的机制研究主要集中在蛋白水解酶系、高分子量的精囊腺蛋白系统,纤溶酶原激活因子系 Normal human semen has the characteristics of solidification after injection and liquefaction in a short time. Seminal injection was thick when the jelly-shaped, is conducive to ejaculation in the female vagina stay, and then the semen liquefaction is conducive to sperm movement. This variation of semen is the result of natural selection by mammals and primates in the process of reproduction. Generally believed that the mechanism of semen solidification and liquefaction mainly concentrated in the proteolytic enzyme system, high molecular weight seminal vesicle gland protein system, plasminogen activator