RELATIVE EFFICIENCY OF CRYSTALLINE SUSPENSIONS OF HEXOESTROL AND OF OESTRADIOL MONOBENZOATE IN INDUCING MAMMARY DEVELOPMENT AND LACTATION IN THE GOAT; AND EFFECTS OF RELAXIN ON MAMMOGENESIS AND LACTATION

Abstract

SUMMARY Suspensions of oestradiol monobenzoate crystals (three intramuscular injections of 25 mg. at intervals of 50 days) in combination with suspensions of progesterone crystals (five injections of 2·1 g. at intervals of 30 days) were more effective in inducing mammary growth and lactation in ovariectomized goats than suspensions of hexoestrol and progesterone crystals administered at similar dose levels and intervals. Daily injections of relaxin during the last 30 days of the above treatments reduced the milk yields apparently by inhibiting mammary growth.