The research was conducted on 6 inter-breed hybrid sheep, at the age of 24 to 50 months and of the body mass of 38-45 kg, which had bipolar electrodes implanted to uterus horns and shank. The registration of uterus myoelectric activity was performed on sheep 24 and 48 hours after sensitizing with estradiol in dose 1,25 mg/on animal. This study showed that there is no statistical differences between uterus horns and shank in myoelectrical activity. The obtained data of the myoelectrical index (MI) in sheep in anestrus 24 hours after sensitizing with estradiol, were MI=10,07±2,85%/h on shank, MI=9,95±2,99%/h on right horn and MI=8,54±2,58%/h on left horn. The frequency of cycles (spindles) of action potentials 24 hours after sensitizing with estradiol were 1,38±0,30/ min. on shank, 1,45±0,29/min on right horn and 1,49±0,26/min on left horn. The value of myoelectrical index 48h after sensitizing were MI=14,77±2,6%/h on shank, MI=13,41±2,53%/h on right horn and MI=12,86±2,85%/h on left horn. The frequency of cycles of action potentials 48 hours after sensitizing with estradiol were 2,07±0,31/min on shank 2,00±0.29/min on right horn and 1,98±0,25/min on left horn. After 48-hours estradiol sensitivisation, as compared to 24-hours estradiol sansitivisation, MI and frequency of cycles of action potentials increased, respectively, by average 4,2%/h and 0,57/min. There were no statistically essential differences found between shank and horns activity. The result of this research is the following: uterus horns and shank both react likewise to estradiol sensitivisation and show similar myoelectrical activity after such stimulation.

23-30