Kızgınlıkları Gözlenemeyen Sütçü İnek ve Düvelerde, Ovsynch, Ovysnch - Progestin, Ovsynch - Progestin - Çift Sun’i Tohumlama Uygulamalarının Gebelik Oranları Üzerine Etkileri

Nak, Yavuz; Tuna, Bilginer; Nak, Deniz; Karakas, Elias; Şimşek, Gözde

doi:10.9775/kvfd.2011.4704

Cited by 1 publication

(1 citation statement)

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“…In the sensitivity analysis, there were not any discrepancies neither in the differences between treatments nor in the hierarchy of treatments. Also another sensitivity analysis was performed by excluding those studies, or subgroups within studies, which are conducted with heifers and we did not observe any notable difference in results (King and Robertson, 1974;Stevenson et al, 2000Stevenson et al, , 2008Iwakuma et al, 2008;Karakas et al, 2009;Nak et al, 2009;Gordon et al, 2010). In another sensitivity analysis that we performed excluding the studies published in Turkish journals in Turkish language, we did not encounter any different results compared to the primary model (Aksu, 2010;Bülbül and Ataman, 2005;Kaçar, 2008).…”

Section: Synthesis Of the Resultsmentioning

confidence: 71%

Comparison of synchronisation protocols on pregnancy rate in dairy cows and heifers: A systematic review and network meta-analysis

Ambarcioglu,

Mavridis,

Yazlik

et al. 2023

J Hellenic Vet Med Soc

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Estrus synchronisation protocols are used as an essential strategy in the reproductive management of dairy herds, including Ovsynch, Presynch, Selectsynch, Heatsynch, Cosynch, Double-Ovsynch, and some other combinations of these, while the optimal protocol is still uncertain. We performed a network meta-analysis (NMA) to compare the efficacy of the synchronisation protocols in dairy cows and heifers. Pubmed, Scopus, Web of Science, Cabi Direct, and The Cochrane Library were searched up to May 13, 2019. The comparison of synchronisation protocols in terms of pregnancy rate was done by combining direct and indirect evidence. Ranking the synchronisation protocols were conducted by using surface under the cumulative ranking curve (SUCRA). 48 randomized trials involving 9 different protocols were included. Compared with the control group, none of the synchronisation protocols were more effective in pregnancy rate at first insemination. Presynch+Ovsynch was found to be more efficient than Ovsynch (RR=1.21, 95% CI:1.04-1.40), also Presynch+Ovsynch and Presynch+Heatsynch were superior to Presynch+Selectsynch (RR=2.01, 95% CI: 1.03-3.93 and RR=1.91, 95% CI: 1.21-3.01). In conclusion, presynchronisation strategies such as Presynch+Ovsynch increase the effectiveness of pregnancy rate at first insemination related to other synchronisation protocols. Nevertheless, the non-superiority of the synchronisation protocols against not applying any hormonal treatments should be considered in reproductive management in dairy herds.

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