The Zinc Content of Rat Sperm Cells from Ejaculate, Vas, Epididymis and Testis.

Abstract
Summary Zinc concentrations are unusually high in rat spermatozoa taken from testis, caudal epididymis and vas, as well as from the ejaculate. This finding supports the view that zinc may play a role in rat fertilization, despite the fact reported by others that the zinc-rich prostatic fluid is not necessary for fertility in that species.