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. 2021 Jan 23;22(3-4):403–408. doi: 10.1186/BF03548665

The Immediate Effect of HCG Upon Plasma Testosterone Levels in the Bull

Den øyeblikkelige effekt av HCG på plasma testosteron nivå hos okse

A Sundby 1,✉
PMCID: PMC8300462  PMID: 7344530

Abstract

No effect of HCG upon the plasma testosterone level in 16 bulls was seen the first 5 or 15 min after injection. In 8 bulls receiving 750 or 1500 i.u. HCG by intravenous injection a lag time of 30 min occurred before plasma testosterone response could be measured. The high plateau level of plasma testosterone concentration was reached approximately 1 h after injection.

Following intramuscular injection of 750 i.u. or 1500 i.u. HCG a lag time of 45–60 min was observed for the testicular response measured as elevated plasma testosterone level. The high plateau levels of plasma testosterone in these bulls were reached approximately 1½ h post injection.

Keywords: bull, HCG, immediate effect, plasma testosterone

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Footnotes

The investigation was financially supported by the Agricultural Research Council of Norway.

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