The epididymis is a coiled tube seen in the scrotum that collects the sperms from the testis’s seminiferous tubules. It is shaped like a crescent and lies longitudinally on the back of the testes. As it merges with the vas deferens, it becomes more straight and thick. Vas deferens then carry the sperms to the prostate and then to the seminal vesicles. In some cases, the epididymis is blocked and blocks the sperm from travelling into the vas deference. The blockage can be on both sides or one side. If the epididymal blockage is on both sides, the semen will not contain any sperms. If it is present on only one side, the semen will have a low sperm count.