THE EFFECTS OF SIMULTANEOUS INJECTIONS OF THE FEMALE AND MALE HORMONES IN CAPONS

Abstract

The effects of combined injections of the [female] and [male] hormones and of alternate in jections on successive days were studied in [5] adult capons. The birds receiving the simultaneous injections developed [female] plumage and [male] headfurnishings. The same results were obtained when the hormones were mixed "in vitro" for 24 hrs. and 48 hrs. respectively previous to injection. When the hormones were administered in the same concentration but on alternate days [female] plumage was not obtained and the headfurnishings showed only very slight growth. There are no indications of an antagonism between the chemically prepared sex hormones with the preparations used in the adult capon, neither is there an intensification of the action of 1 hormone in the presence of the other.