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Gewählte Publikation:

Publikationstyp: Zeitschriftenaufsatz
Dokumenttyp: Originalarbeit

Jahr: 1995

AutorInnen: Son, Ch; Schwarzenberger, F; Arbeiter, K

Titel: Relationship Between Ultrasonographic Assessment Of The Corpus-Luteum Area And Milk Progesterone Concentration During The Estrous-Cycle In Cows.

Quelle: Reprod Domest Anim (30), 3 97-100.



Autor/innen der Vetmeduni Vienna:

Schwarzenberger Franz

Beteiligte Vetmed-Organisationseinheiten
Institut für Physiologie, Pathophysiologie und Biophysik, Abteilung für Physiologie, Pathophysiologie und experimentelle Endokrinologie
Universitätsklinik für Kleintiere, Klinische Abteilung für Geburtshilfe, Gynäkologie und Andrologie


Abstract:
Ultrasonography was used to examine the cavity within the Corpus luteum and to measure the Corpus luteum area during the estrous cycle in cows (n = 12). Cows were divided into cows that had a Corpus luteum with (n = 7) or without (n = 5) a cavity. Ultrasound examination and collection of of milk samples for progesterone assay were performed at 2-day intervals on days 0-12, and then daily from day 14 to the day of the next ovulation. The means for Corpus luteum area and for milk progesterone concentration during the estrous cycle were not significantly different between cows that had a Corpus luteum either with or without a cavity. The correlation coefficients between Corpus luteum area and milk progesterone concentration during luteal development (days 2-8) were 0.69 (p < 0.0001) and 0.75 (p < 0.0001) for Corpora lutea with and without a cavity, respectively, while, during luteal regression (days -6 to 0 relative to the next ovulation), they coefficients were 0.73 (p < 0.0001) and 0.77 (p < 0.0001), respectively. The correlation coefficients, combined for both stages of the estrous cycle and both luteal statuses, came to 0.69 (p < 0.0001). These results indicate that Corpus luteum area is significantly correlated to milk progesterone concentration, and ultrasonographic assessment of the Corpus luteum is a reliable method for estimating peripheral progesterone concentrations during the estrous cycle in cows.


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