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The change in luteal blood flow and luteal size after beta carotene and GnRH injections in early pregnant dairy cows


Serhan Serhat, A Y; Kükükaslan, I; Kaya, D; Mülazimoglu, B; Emre, B; Kaçar, Cihan; Kalender, H; Findik, Murat; Bollwein, Heiner; Riegler, M; Schäfer, S; Scholbach, J (2012). The change in luteal blood flow and luteal size after beta carotene and GnRH injections in early pregnant dairy cows. Kafkas Universitesi Veteriner Fakultesi Dergisi, 18(6):1035-1041.

Abstract

The aim of this study was to determine the effectiveness of intramuscular injections of beta-carotene (βC) and GnRH on luteal size (LS), luteal blood flow (LBF) and serum βC concentrations in early pregnant cows. Twenty-nine Holstein-Friesian cows with a mature corpus luteum (>19mm) were randomly assigned to two groups: βC not received (βC-; n=15) or received (βC+; n=14). All cows were treated with PGF2α and inseminated twice, 48 and 72h after the treatment. Last AI was considered to be day 0. All cows received GnRH on day inseminations, 7 and 17. Different from the βC-, the βC+ group received βC intramuscularly on day 7 and 17. In both groups, measurement of LS and LBF were performed on days 7, 10, 17, 27 and 37 by transrectal B-mode and colour Doppler ultrasonography. Blood samples were collected on each examination day. Only cows that became pregnant were included in the statistical evaluation. The concentration of βC in the βC+ group was higher than in the βC- at all examination days except day 17 (P<0.05). There was no significant difference between groups concerning the progesterone concentrations (P>0.05). The LS and LBF of βC+ group on day 7 (P<0.05) and 27 (P<0.01) was higher than in the βC- group and values increased significantly until day 37 (LS: P<0.05, LBF: P<0.01). We conclude that βC injections significantly increased serum βC concentrations, as well as LS and LBF.

Abstract

The aim of this study was to determine the effectiveness of intramuscular injections of beta-carotene (βC) and GnRH on luteal size (LS), luteal blood flow (LBF) and serum βC concentrations in early pregnant cows. Twenty-nine Holstein-Friesian cows with a mature corpus luteum (>19mm) were randomly assigned to two groups: βC not received (βC-; n=15) or received (βC+; n=14). All cows were treated with PGF2α and inseminated twice, 48 and 72h after the treatment. Last AI was considered to be day 0. All cows received GnRH on day inseminations, 7 and 17. Different from the βC-, the βC+ group received βC intramuscularly on day 7 and 17. In both groups, measurement of LS and LBF were performed on days 7, 10, 17, 27 and 37 by transrectal B-mode and colour Doppler ultrasonography. Blood samples were collected on each examination day. Only cows that became pregnant were included in the statistical evaluation. The concentration of βC in the βC+ group was higher than in the βC- at all examination days except day 17 (P<0.05). There was no significant difference between groups concerning the progesterone concentrations (P>0.05). The LS and LBF of βC+ group on day 7 (P<0.05) and 27 (P<0.01) was higher than in the βC- group and values increased significantly until day 37 (LS: P<0.05, LBF: P<0.01). We conclude that βC injections significantly increased serum βC concentrations, as well as LS and LBF.

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Additional indexing

Other titles:Erken Gebe Sütçü İneklerde Beta Karoten ve GnRH Enjeksiyonlarından Sonra Luteal Kan Akışı ve Luteal Büyüklükteki Değişiklikler
Item Type:Journal Article, not_refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Farm Animals
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Language:English
Date:2012
Deposited On:11 Dec 2018 16:34
Last Modified:25 Apr 2019 07:29
Publisher:University of Kafkas
ISSN:1300-6045
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.9775/kvfd.2012.6959
Official URL:http://vetdergikafkas.org/abstract.php?id=1214

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