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International Journal of Veterinary Medicine

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Parasitology and veterinary sanitary examination, anatomy and pathanatomy - Faculty of Veterinary Medicine of the Stavropol State Agrarian University. Morphological changes in sheep ovaries in postnatal ontogenesis

https://doi.org/10.17238/issn2072-2419.2020.1.123

Abstract

The study of ovarian morphology in sheep during age periods, when this organ undergoes a significant restructuring, is of important theoretical and practical importance. In sheep farms in the Eastern zone of the Stavropol territory, histological studies of sheep ovaries in postnatal ontogenesis were performed to determine the thickness of the rudimentary epithelium, the protein envelope, the thickness of the cortical and cerebral layer, as well as the diameter of the follicles and yellow bodies. The results revealed that sheep of Stavropol breed set catalog thickness of epithelium is in the range of 2.07±0,19-of 13.73±0,41 gm, the thickness of the tunica - of 4.91±0,21-of 18.96±0,49 gm, the thickness of the cortical layer - 84,28±6,48-120,55±1,98 gm, and the thickness of the medulla wins with 52.86±2,56-106,85±of 1.76 gm.A significant increase in these structures in the ovary occurs at the time of puberty (six months), further there is a slowdown in the growth rate of layers in the ovary and by nine to twelve months it remains unchanged, which indicates the completion of the development of the organ. Analysis of the dynamics of the diameter of follicles and yellow bodies showed that the diameter of primordial (2.62±0.03-8.37±0.69 microns), primary (25.28±0.97-46.48±5.27 microns), secondary (35.20±3.82-91.57±5.28 microns) follicles increases with age. Tertiary follicles in the ovary are detected at three months, and yellow bodies from six months of life and their diameter is in the range of 372.56±60.28526.17±32.78 microns and 105.32±0.80117.12±0.62 microns, respectively. The reliable data obtained by us on changes in the diameter of follicles and yellow bodies are probably related to the active influence of gonadotropins on the ovaries, which are responsible for the growth, maturation of follicles, ovulation and formation of yellow bodies

About the Authors

A. S. Kuzminova
FSBEI VO "Stavropol state agrarian University"
Russian Federation


A. N. Kvochko
FSBEI VO "Stavropol state agrarian University"
Russian Federation


V. S. Skripkin
FSBEI VO "Stavropol state agrarian University"
Russian Federation


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For citations:


Kuzminova A.S., Kvochko A.N., Skripkin V.S. Parasitology and veterinary sanitary examination, anatomy and pathanatomy - Faculty of Veterinary Medicine of the Stavropol State Agrarian University. Morphological changes in sheep ovaries in postnatal ontogenesis. International Journal of Veterinary Medicine. 2020;(1):123-128. (In Russ.) https://doi.org/10.17238/issn2072-2419.2020.1.123

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ISSN 2072-2419 (Print)