Association of pregnancy per artificial insemination with gonadotropin-releasing hormone and human chorionic gonadotropin administered during the luteal phase after artificial insemination in dairy cows: A meta-analysis

M. Besbaci, A. Abdelli, Jean-Joseph Minviel (), I. Belabdi, R. Kaidi and D. Raboisson ()
Additional contact information
M. Besbaci: UB1 - Université Saâd Dahlab Blida 1, Ecole Nationale Supérieure Vétérinaire d’Alger
A. Abdelli: UMAOB - Université Mohamed Akli Ouelhadj de Bouira
Jean-Joseph Minviel: IHAP - Interactions hôtes-agents pathogènes [Toulouse] - ENVT - Ecole Nationale Vétérinaire de Toulouse - Toulouse INP - Institut National Polytechnique (Toulouse) - UT - Université de Toulouse - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, UMRH - Unité Mixte de Recherche sur les Herbivores - UMR 1213 - VAS - VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement
I. Belabdi: UB1 - Université Saâd Dahlab Blida 1
R. Kaidi: UB1 - Université Saâd Dahlab Blida 1
D. Raboisson: IHAP - Interactions hôtes-agents pathogènes [Toulouse] - ENVT - Ecole Nationale Vétérinaire de Toulouse - Toulouse INP - Institut National Polytechnique (Toulouse) - UT - Université de Toulouse - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement

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Abstract: One strategy for improving fertility in cattle is administration of GnRH or human chorionic gonadotropin (hCG) during the luteal phase, which increases progesterone (P4) secretion and delays luteolysis. To provide an overview of how GnRH or hCG treatment between 4 and 15 d after artificial insemination (AI) improves pregnancy per AI (P/AI) in cows, a meta-analysis was performed on 107 different trials from 52 publications. Data from 18,082 treated cows and 18,385 untreated controls were meta-analyzed. The meta-analysis explained the relative risk for P/AI with GnRH or hCG treatment under various circumstances. The results did not show any difference in P/AI between cows treated with hCG and cows treated with GnRH. Compared with no treatment, treatment with GnRH or hCG improved the chances of P/AI in cows with very poor (60.1%). Moreover, treatment with GnRH and hCG improved the chances of P/AI in primiparous cows. The improvement was much better in primiparous cows with very low fertility. Treatment with buserelin at a dose above 10 p,g and with hCG at a dose above 2,500 IU was associated with increased chances of P/AI compared with lower doses. Treatment with GnRH 10 d after AI was also associated with increased chances of P/AI compared with earlier treatment. The present meta-analysis showed that the use of GnRH and hCG after AI should be focused on cows expected to have low or moderate fertility. Day and dose of treatment have to be considered as well.

Keywords: human chorionic gonadotropin; gonadotropin-releasing hormone; artificial insemination; cow (search for similar items in EconPapers)
Date: 2020-02
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Published in Journal of Dairy Science, 2020, 103 (2), pp.2006-2018. ⟨10.3168/jds.2019-16439⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-03108976

DOI: 10.3168/jds.2019-16439

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