Abstract
The increase in seminal vesicle and ventral prostate wts. in immature male rats following a single subcut. injn. of 0.25 mg. of testosterone propionate is not influenced by the volume of oil (0.1-0.8 ml.). Wt. of the seminal vesicle increased more than wt. of the ventral prostate, whereas testes wt. decreased. Subcut. and intramusc. routes of administration increased accessory sexual organ wt. equally well, in contrast to the intraperit. route, where one injn. had little effect.