Vet World   Vol.13   April-2020  Article-24

Clinical and structural changes in reproductive organs and endocrine glands of sterile cows

Background and Aim: The study aimed to determine both macroscopic and microscopic changes in the reproductive organs of sterile cows.

Materials and Methods: Careful clinical and gynecological examinations (using histological and histochemical methods) of organs of culled sterile cows, such as ovaries, oviducts, the uterus, pars anterior adenohypophysis, thyroid body, and adrenals, were performed.

Results: It was found that 20% of the examined cows in the farms of the Republic of Bashkortostan had pathology of reproductive organs. Ovarian dysfunction was diagnosed in 31% of sterile cows. Histological and histochemical studies revealed that high atresia of all types of ovarian follicles is associated with hypofunction of the ovaries. This was related to stromal vascular dystrophy and was accompanied by atrophy of thecal endocrine elements, resulting in decrease of endocrine and generative function of ovaries.

Conclusion: Essential elements of the ovarian dysfunction pathogenesis are disorders of the functional system "ovary-pituitary-adrenal-thyroid gland" and the abnormality of utero-ovarian relationships, which differ significantly during hypofunction, in case of follicular cysts, and in case of persistent corpora lutea. This difference in abnormalities of utero-ovarian relationships should be considered when developing diagnostic and treatment methods and determining preventive measures. Keywords: cows, endocrine glands, morphology, ovaries, reproductive organs, sterility.

Keywords: cows, endocrine glands, morphology, ovaries, reproductive organs, sterility.

How to cite this article: Skovorodin E, Mustafin R, Bogoliuk S, Bazekin G, Gimranov V (2020) Clinical and structural changes in reproductive organs and endocrine glands of sterile cows, Veterinary World, 13(4): 774-781.

Received: 25-12-2019  Accepted: 12-03-2020     Published online: 24-04-2020

Corresponding author: Evgeny Skovorodin   E-mail: skovorodinev@rambler.ru

DOI: 10.14202/vetworld.2020.774-781

Copyright: Skovorodin, et al. This article is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http:// creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.