Pavel I Khristianovskiy, Stanislav A Platonov, Timur B Aldyarov

Animal Husbandry and Fodder Production. 2022. Vol. 105, no 4. Р. 101-110.

doi:10.33284/2658-3135-105-4-101

Original article

Gonadotropins and estrogens interaction in the body of sheep during sexual estrus stimulation

Pavel I Khristianovskiy1, Stanislav A Platonov2, Timur B Aldyarov3

1,2,3Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, Orenburg, Russia

 1paor1953@bk.ru, https://orcid.org/0000-0003-3902-4379

 2platonstas1994@mail.ru, https://orcid.org/0000-0002-9806-412X

 3aldyyarov97@mail.ru, https://orcid.org/0000-0002-8636-7553

 Annotation. In the last decade, farmers have regained interest in sheep breeding, and sheep herds has gradually increased in Russian Federation. The demand of increasing the yield of young animals has emerged, that is, to increase the sheep fertilization during the mating campaign. For this purpose, various schemes are used for sexual estrus stimulation, including during the period of seasonal anaphrodisia. The aim of the research was to study the ratio of sex hormones - progesterone, follicle-stimulating hormone (FSH), luteinizing hormone (LH) and free estriol - when performing various schemes of sexual estrus stimulation in Romanov sheep. The study was conducted in sheep during the post- lambing period in April 2022. Three groups of 12 sheep were formed. In all groups, sheep were injected with E-selen twice. Synchronization was not performed in the control group. Double introduction of estrophan was used after 11 days in the second group, a complex synchronization scheme (follimag – progestamag, surfagon) was used in the third group. Analysis of the hormones dynamics in the blood of experimental animals suggests that hidden processes similar to sexual cycles, but shortened, occur in the body of sheep during this period. In this regard, a scheme with a double injection of prostaglandins is impractical to apply in sheep. The scheme with the use of follimag and progestamag with surfagon with a weekly interval is more adapted to the sheep's body.

 Keywords: sheep, seasonal anaphrodisia, stimulation of sexual estrus, LH, free estriol

 Acknowledgements: the work was performed in accordance to the plan of research work for 2021-2023 FSBRI FRC BST RAS (No. 0761-2019-0006).

 For citation: Khristianovskiy PI, Platonov SA, Aldyarov TB. Gonadotropins and estrogens interaction in the body of sheep during sexual estrus stimulation. Animal Husbandry and Fodder Production. 2022;105(4):101-110. (In Russ.). https://doi.org/10.33284/2658-3135-105-4-101

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Information about the authors:

 Pavel I Khristianovsky, Dr. Sci. (Biology), Senior Researcher at the Department of Technology of Beef Cattle Breeding and Beef Production, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 29, January 9, Orenburg, 460000, tel.: 8(3532)43-46-78, phone: 89877814269.

 Stanislav A. Platonov, Cand. Sci. (Biology), Researcher of the Department of Technology of Beef Cattle Breeding and Beef Production, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 29, January 9, Orenburg, 460000, tel.: 8(3532)43-46-78.

 Timur B Aldiyarov, laboratory assistant of the Department of Technology of Beef Cattle Breeding and Beef Production, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 29, January 9, Orenburg, 460000, tel.: 8(3532)43-46-78.

The article was submitted 10.11.2022; approved after reviewing 28.11.2022; accepted for publication 12.12.2022.

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