Concepedia

Abstract

ABSTRACT Inhibition of fertility in female mice by steroid implants has been studied. 19-Norprogesterone, 10% and 20 % pellets, and testosterone, 15% and 45 % pellets, were effective fertility inhibitors in female mice. Two important antifertility steroids, chlormadinone and 17α-acetoxypregn-4,6-diene-3,20-dione were only moderately effective. The present data on a relatively limited number of compounds indicate that the anti-fertility activity of progestational agents in normal female mice is a parameter independent of the basic progestational activity, anti-ovulatory activity and anti-oestrogenic activity.