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EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS

Year 2002, Volume: 28 Issue: 2, 353 - 360, 02.08.2013

Abstract

Summary

The aim of this study was to investigate the effect of PGF2α analogues and GnRH in cows, which had no spontaneous oestrus at 55-65"1 days postpartum, on oestrus, serum estradiol 17 p and pregnancy rates. The study was conducted in the Trakia Region on a total of 88 Holstein cows aged between 3-8 years and had no spontaneous oestrus in 55 days postpartum. The cows were separated into two groups (I. group n=46. II. group n=42). 0.5 mg cloprostenol was administered twice with 11 days interval to the I. group by [,M route. After coming to heat, the cows (n=44) of the first group were divided into two sub-groups. One of these sub-groups received 2.5 ml GnRH (Reccptal® Topkim) after the second cloprostenol and artificial insemination. Cows in the second group were treated with 25 mg Dinoprost by I.M route with 11 days interval. Like the first group these cows (n=39) also were divided into two sub-groups and one received a GnRH (Reccptal® Topkim) injection following artificial insemination. All cows in the first and second groups were inseminated artificially on 72nd and 96th hours following the second prostaglandin injections. Daily blood samples were collected from cows in both groups from the PGF2a administration day to 96th hour after administration, in order to determine serum estrogen levels. Highest scrum estrogen level was observed on the 3rd day after PGF2a administration in both (I. and II. groups) groups. Pregnancy was achieved in 32 of 46 cows (69.6%) in the first group and in 29 of 42 cows (64.1 %) in the second group. In the first group. 11 (50%), of 22 cows which had received GnRH after being inseminated conceived in the first cycle and other 8 conceived in the second cycle (36.4%). Eight of the cows which had not received GnRH conceived in the first cycle (n=22. 36.4%) and 5 (22.7%) cows conceived in the second cycle. In the second group 10 of 20 cows (n=20. 50%). which had received GnRH after being inseminated conceived in the first cycle and 6 (30%) conceived in the second cycle. Eight of the cows which had not received GnRH (n-19.42.1%) conceived in the first cycle and 5 (26.3%) in the second cycle. Administration of PGF2α analogues introduced for induction of oestrus cycles and ovarium activities in postpartum anoestrus events, made no improvement in oestrus and pregnancy rates. However, administration of GnRH together with prostaglandins makes a positive effect on the number of inseminations per pregnancy and pregnancy rates.

Key Words: Postpartum cow, PGF2α analogues, Pregnancy rates, GnRH

Year 2002, Volume: 28 Issue: 2, 353 - 360, 02.08.2013

Abstract

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Details

Primary Language Turkish
Journal Section Research Article
Authors

Çağatay Tek

M. Kılıçarslan

Ahmet Sabuncu This is me

Güven Kaşıkçı

Sehat Alkan

Publication Date August 2, 2013
Published in Issue Year 2002 Volume: 28 Issue: 2

Cite

APA Tek, Ç., Kılıçarslan, M., Sabuncu, A., Kaşıkçı, G., et al. (2013). EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS. İstanbul Üniversitesi Veteriner Fakültesi Dergisi, 28(2), 353-360. https://doi.org/10.16988/iuvfd.01278
AMA Tek Ç, Kılıçarslan M, Sabuncu A, Kaşıkçı G, Alkan S. EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS. iuvfd. August 2013;28(2):353-360. doi:10.16988/iuvfd.01278
Chicago Tek, Çağatay, M. Kılıçarslan, Ahmet Sabuncu, Güven Kaşıkçı, and Sehat Alkan. “EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS”. İstanbul Üniversitesi Veteriner Fakültesi Dergisi 28, no. 2 (August 2013): 353-60. https://doi.org/10.16988/iuvfd.01278.
EndNote Tek Ç, Kılıçarslan M, Sabuncu A, Kaşıkçı G, Alkan S (August 1, 2013) EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS. İstanbul Üniversitesi Veteriner Fakültesi Dergisi 28 2 353–360.
IEEE Ç. Tek, M. Kılıçarslan, A. Sabuncu, G. Kaşıkçı, and S. Alkan, “EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS”, iuvfd, vol. 28, no. 2, pp. 353–360, 2013, doi: 10.16988/iuvfd.01278.
ISNAD Tek, Çağatay et al. “EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS”. İstanbul Üniversitesi Veteriner Fakültesi Dergisi 28/2 (August 2013), 353-360. https://doi.org/10.16988/iuvfd.01278.
JAMA Tek Ç, Kılıçarslan M, Sabuncu A, Kaşıkçı G, Alkan S. EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS. iuvfd. 2013;28:353–360.
MLA Tek, Çağatay et al. “EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS”. İstanbul Üniversitesi Veteriner Fakültesi Dergisi, vol. 28, no. 2, 2013, pp. 353-60, doi:10.16988/iuvfd.01278.
Vancouver Tek Ç, Kılıçarslan M, Sabuncu A, Kaşıkçı G, Alkan S. EEFECTS OF DİFFERENT PGF2α ANALOGUES (CLOPROSTENOL, DINOPROST) AND GnRH ON OESTRUS, SERUM ESTRADIOL 17β AND PREGRANCY RATES IN POSTPARTUM COWS. iuvfd. 2013;28(2):353-60.