FUNCTIONAL ACTIVITY OF FOLLICULAR EPITHELIUM AND OVIDUCT EPITHELIUM IN COWS WITH PERSISTENCE OF OVARIAN CORPUS LUTEUM
DOI:
https://doi.org/10.52269/22266070_2022_2_14Keywords:
black-and-white cows, persistent corpus luteum of ovarians, oviduct, functional activity, reproductionAbstract
The article contains the results of complex morphometric and cytometric studies of oviducts in cows with persistence of ovarian corpus luteum. 25% of animals with impaired reproductive function had persistent corpus luteum (PCL) of ovarians. 60% of cases occurs in the left ovary.
The morphometric parameters of the right ovary of cows areinferior than that of the left ovary: the left ovary exceeds by 7.6% and 6% more in width than the right ovary. The cytoplasm area of the follicular epithelium of the left ovary is 19.29% less than that of the right ovary. Nuclear area of follicular epithelium of the left ovary is 19.31% greater than that of the right ovary. Small nuclei predominates in the right ovary. With PCL of ovarians, the total wall thickness is reduced in both oviducts. Moreover, the cytometric values of oviduct surface epithelium are changing: decreasing the area of protoplasm and the nuclei of surface epithelial cells of the left ovary (50,9±11,5 and 22,1±5,7, Р≥0,001) and of the right ovary (38,6±10,1(мkм2), Р≥0,01 and 17,1±4,1(мkм2), Р≤0,05).
Functional activity of surface epithelium of the left oviduct is 0.440±0.090 (Р≤0.05) (from 0.254 to 0.636), and
of the right oviduct – 0.448±0.06 (Р≤0.05) (from 0.280 to 0.624). Large cells with large nuclei and higher
functional activity (nuclear-protoplasmic ratio) predominate in the left oviduct.
Key words: cows, persistent corpus luteum of ovarians, oviduct, functional activity, reproduction.
