Abstract
The purpose of our study is to study the functional morphology of the Corpus Luteum (CL) of the ovaries of pregnant and infertile cows in normal and pathological conditions. For that purpose, the ovaries of cows were examined after slaughter, histological and histochemical examination of the CL was carried out. For the antemortem examination of the ovary, the biopsy method developed by us was used. The effect of the synthetic analogy of prostaglandin F2α - Klatiram was studied experimentally. It was established that the CL and luteal formations of the ovaries of those animals had significant changes in structure, which allowed us to develop morphological markers for diagnosing their morphofunctional state. It was found that the mass and size of the CL increases by two months, decreases by three months and then remain relatively stable. There is a growth of antral follicles that reach a size of more than 1 cm and then they undergo atresia of the obliteration type. The CL of the ovary cycle reaches its maximum development in the first ten or twelve days. Later, against the background of venous hyperemia and atrophic changes, it decreases, the lobulation of the parenchyma disappears and the vessels sclerose (the stage of involution). A method of biopsy of the bovine ovaries has been developed. The use of this method, with the experimental introduction of a synthetic analog of prostaglandin F2a, has proved that luteolytic processes in the CL of the ovary cycle develop due to violations of the microcirculatory bloodstream, development of necrobiotic processes in the parenchyma and stromal vascular dystrophy of the mesenchyma of the gland.
Highlights
We found that the ovaries contained large Corpus Luteum (CL) and luteinized follicles and atretic bodies, as well as luteal cysts
The development of these structures is accompanied by a decrease in the growth of antral follicles under normal and in pathological conditions
After conducting a comprehensive study, we convinced ourselves that CL of pregnancy, CL of the ovary cycle, persistent CL and luteal cysts have significant differences in the structure and, in endocrine activity they are arranged in the same way
Summary
The production of progesterone is believed to start after puberty, mainly by the ovarian Corpus Luteum (CL) and, in small amounts, by the adrenal glands, as well as by the placenta during pregnancy (Jameson and De Groot, 2015; Noakes et al, 2018; Rivera, 2016) luteal atretic bodies are described in ensuing fetuses so far (Skovorodin et al, 2018).For many years, the morphology and function of bovine ovarian lutein structures have been the subject of intense research and discussion (Costa et al, 2020; Mogheiseh et al, 2020; Walusimbi and Pate, 2014; Xavier et al, 2012). The production of progesterone is believed to start after puberty, mainly by the ovarian Corpus Luteum (CL) and, in small amounts, by the adrenal glands, as well as by the placenta during pregnancy (Jameson and De Groot, 2015; Noakes et al, 2018; Rivera, 2016) luteal atretic bodies are described in ensuing fetuses so far (Skovorodin et al, 2018). The function of antral and cystic CL, as well as the features of vascularisation of this gland, are unclear (Jaśkowski, 2019; Siqueira et al, 2019). The available papers describe differences in the CL of pregnancy, ovary cycle and endometritis (Mogheiseh et al, 2020; Sawyer, 1995)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: American Journal of Animal and Veterinary Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
