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Sonographic studies on the significance of follicle size and corpus luteum morphology in dairy cows after insemination

Eggenschwiler, Mario; Lejeune, Beatrice; Bruckmaier, Rupert; Bleul, Ulrich (2023). Sonographic studies on the significance of follicle size and corpus luteum morphology in dairy cows after insemination. Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere, 51(4):218-227.

Abstract

OBJECTIVE

In dairy cattle, numerous factors determine the success of an insemination. The aim of the present study was to generate findings concerning the association between the preovulatory follicles, the corpora lutea with or without cavities and pregnancy in dairy cows under field conditions.

MATERIAL AND METHODS

Data was obtained from 176 dairy cows scheduled for artificial insemination. The cows were gynecologically examined using sonography at the time of insemination, 24 hours later, on day 9, on day 34 and after day 42 after insemination. Additionally, blood samples were collected from the coccygeal vein at the time of insemination and on day 9 in order to determine blood progesterone level.

RESULTS

Depending on the result of the pregnancy test, no difference was detected between the dimensions of the follicles, corpora lutea as well as their cavities and progesterone levels 9 days after insemination in the dairy cows with spontaneous ovulations. In contrast to the corpus luteum without cavity, the surface area of the corpus luteum with cavity remained constant during the study period, while at the same time the cavity decreased in size to a significant degree. In addition, breed differences in corpus luteum sizes were detected on day 34.

CONCLUSION

No cause was detected for the formation of cavities in corpora lutea and there was no link to the follicle from which the corpus luteum developed.

CLINICAL RELEVANCE

Both the changes in corpus luteum sizes over time and their breed-related differences could have an impact on insemination outcome.

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Farm Animals
Dewey Decimal Classification:570 Life sciences; biology
Scopus Subject Areas:Health Sciences > Food Animals
Health Sciences > General Veterinary
Language:German
Date:August 2023
Deposited On:22 Nov 2023 07:16
Last Modified:30 Oct 2024 02:37
Publisher:Georg Thieme Verlag
ISSN:1434-1220
OA Status:Closed
Publisher DOI:https://doi.org/10.1055/a-2124-1345
PubMed ID:37820627

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