[Effects of testosterone propionate on LH and testosterone concentrations before and after the injection of gonadoliberin in young bulls pre-treated with dexamethasone].
This preliminary study has been performed on four young twin bulls, one pair aged 6 months and the other one aged 12 months. Plasma LH and testosterone were assayed from frequent blood sampling. Testosterone propionate (TP) following dexamethasone treatment did not significantly influence the LH response to gonadoliberin compared to the twin controls, although testosterone concentrations were high in those TP treated animals.
D000818:Animals; D002417:Cattle; D003907:Dexamethasone / Q000494:pharmacology*; D007987:Gonadotropin-Releasing Hormone / Q000494:pharmacology*; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D010903:Pituitary Gland, Anterior / Q000187:drug effects*; D013739:Testosterone / Q000031:analogs & derivatives* / Q000097:blood* / Q000494:pharmacology; D013997:Time Factors
D007987:Gonadotropin-Releasing Hormone; D013739:Testosterone; D003907:Dexamethasone; D007986:Luteinizing Hormone
Effets du propionate de testostérone sur les concentrations de LH et de testostérone avant et après l'injection de gonadolibérine chez de jeunes taurillons préalablement traités par la dexaméthasone.