Determination of the effectiveness of ovarian ultrasound during synchronization of sexual hunting in cows

Abstract

The article presents the results of an experimental evaluation of the effectiveness of the estrus synchronization program under ultrasound control for diagnosing the state of the ovaries in cows. In this work, the influence of hormonal preparations on the dynamics of lysis of the corpus luteum and the growth of follicles in the ovaries in cows with the help of an ultrasound machine is determined. Evaluation of the effectiveness of synchronization of estrus and determination of the effect of hormonal preparations on the state of the ovaries in dairy cows was carried out from March to August 2021 in the Volgograd region on the farm of Donskoye JV LLC. To conduct a production experiment, two experimental groups of Holstein cows were formed, 30 heads each.For ultrasound examination of the ovaries in the second experimental group, an Easi-Scan Curve ultrasound scanner from BCF Technology was used. Linear matrix converters with a frequency range from 5.0 to 7.5 MHz. Transrectal ultrasound was performed by introducing an ultrasound transducer into the rectum. This made it possible to visualize and evaluate the architecture of the ovaries.As a result, the analysis of the ultrasound image revealed that the double use of Prosolvin contributes to the regression of the corpus luteum. Before the use of prostaglandin, the corpus luteum had a size of 3x2 cm, but after the intramuscular injection of Prosolvin, the corpus luteum regressed, its size began to decrease, then it completely disappeared. After the use of Ganodin, the level of luteinizing hormone in the blood of animals begins to increase, which contributes to folliculogenesis, ovulation of follicles and the manifestation of estrus.Thus, ultrasound diagnostics of the ovaries made it possible to reduce the cost of hormonal preparations and timely put the animals on treatment.