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The effect of hormonal superovulation preparations of FSH (450 IU) or PMSG (1500 IU), on concentration of catecholamines (dopamine, norepinephrine and epinephrine) was studied in the oestrus period using radioenzymatic methods in the median eminence of the sheep. The administration of FSH caused a significant increase in the concentrations of norepinephrine (NE) and epinephrine (EPI) in the median eminence (ME) of sheep (p < 0.01 and p < 0.05, respectively). the comparison of the effect of hormonal preparations on the changes in catecholamine levels showed that the effect of FSH was observed mostly in eminentia mediana of sheep. We propose that the given changes in concentrations of catecholamines in the median eminence of sheep after administration of PMSG or FSH are related to steroids after hormonal stimulation.

Concentrations of Catecholamines in the Median Eminence of Sheep after Superovulation