INFLUENCE OF MASSAGE OF THE SEMINAL VESICLES AND AMPULLAE AND OF COITUS ON WATER DIURESIS OF THE RAM

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Abstract
SUMMARY: Massage of the seminal vesicles and ampullae was carried out 68 times during 35 diuresis experiments on 6 sexually mature rams. The animals had received a hydrating dose of water. In 52 cases (76%) definite inhibition of water diuresis was observed accompanied by increased concentrations of chloride, sodium and potassium in the urine. Ejaculation was observed after 42 stimuli (61%). The influence of coitus on water diuresis was studied on 5 rams in 24 experiments. In 17 cases out of 48 (35%) coitus caused definite inhibition of water diuresis together with increased concentrations of chloride, sodium and potassium in the urine. These antidiuretic responses were weaker than those observed after massage of the seminal vesicles and ampullae. Evidence of ejaculation was obtained after coitus on 37 occasions (77%). The antidiuretic action of physiological doses of oxytocin was very low. The inhibition of urine flow induced by massage of the seminal vesicles and ampullae or coitus could be imitated by intravenous injection of physiological doses of ADH. The mean antidiuretic effects in response to massage were matched by injection of 3–4 mu. Pitressin. The mean antidiuretic effects induced by coitus were equivalent to 2 mu. Pitressin. It is concluded that there is a release of ADH in response to massage of the seminal vesicles and ampullae. There is some evidence that a similar phenomenon occurs during coitus.