The Elemental Composition of the Environments of the Gametes and Preimplantation Embryo During the Initiation of Pregnancy

Abstract
Micropuncture and electron probe microanalysis were used to determine the concentrations of Na, Cl, K, Ca, Mg, S and P in picoliter volumes of fluid in the microenvironments of male and female gametes and zygotes in the female genital tract of the mouse.