人到中年,身体各系统器官都开始逐渐衰退,男性生殖系器官也不例外。男性生殖器的衰老主要表现为睾丸的生精作用和内分泌作用衰退。中年以后,睾丸中的生精细胞和分泌雄激素睾丸酮的细胞组织不断减少,纤维性组织却不断增多,引起睾丸渐渐萎缩变小,精子减少,睾丸酮水平下降。实际上这一过程是缓慢进展的或呈阶段性下降。一般说来睾丸功能在人的一生中不会完全消失。那么,多大年龄的人不 Middle-aged people, the body’s organs have begun to decline gradually, the male genital organ is no exception. Male genital aging mainly for the testes spermatogenesis and endocrine recession. After middle age, the spermatogenic cells in testis and the secretion of androgen testosterone continue to reduce cellular tissue, fibrous tissue has been increasing, causing the testis shrinking smaller, sperm decreased, decreased testosterone levels. In fact, the process is slow or gradual decline. Testicular function in general will not disappear completely in human life. So, how old are you?