Estimation of Plasma Androgenic and Progestational Steroids in the Laying Hen

Abstract
Preliminary studies using double-isotope and electron-capture methods revealed the presence of progesterone, 20[alpha]-hydroxy-pregn-4-en-3-one, 20[beta]-hydroxy-pregn-4-en-3-one, testosterone, and [DELTA]4-and-rostenedione in the plasma of the mature laying hen.