Cortisol Content of Semen and the Effect of Exogenous Cortisol on the Concentration of Cortisol and Minerals (Ca, Mg, K and Na) in Semen and Blood Plasma of Bulls

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Abstract
The cortisol content of blood plasma and semen of bulls was less than 2.2 .mu.g/100 ml and was not influenced by repetitive ejaculation. Within 40 min after injection of 500 mg cortisol i.v., the cortisol content of semen was similar to blood plasma indicating a rapid transfer of the cortisol into the reproductive tract secretions. Following cortisol administration, plasma levels of Ca and Mg were increased, K was decreased and Na remained unchanged. Semen mineral levels were not altered after cortisol injection.