Artificial gestagenization as a method of preparing ewes for a mating campaign

Abstract

Goal. To study the effectiveness of the artificial gestagenization procedure as a method of increasing the readiness of ewes for sexual activity and fertilization within the framework of traditional breeding technology. Methods. The study was conducted in 2016–2022. Animals were subjected to hormonal treatment with progestogenic drugs and artificial insemination, followed by fixation of the results of lambing. The effectiveness of different gestagenization schemes was determined by comparing reproduction rates using conventional ANOVA algorithms of the Excel mathematical apparatus of Microsoft Office 10. Results. Five of the six gestagenization regimens used in August showed positive effects on fertility and prolificness. In terms of reproduction and monetary profitability, the most effective preparation scheme was the one in which animals were injected once with 2 ml of Progesterone 2.5% in mid-August (10–15 days before the beginning of the natural restoration of the manifestation of sexual hunting). It was found that the use of artificial gestagenization in July was ineffective. Conclusions. The procedure of artificial gestagenization of sheep before the sexual season can improve reproduction rates and can be recommended as a technological technique for preparing ewes for a mating campaign. The best effectiveness in initiating gestagenization is secured by a drug of exogenous progesterone.