Resynchronisation as an element of improving cattle reproduction efficiency

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Oestrus resynchronisation (RES, Resynch) programmes for non-pregnant cows allow shortening the period between an unsuccessful insemination and the next attempt on the same cow. The protocol of oestrus RES may be started after ruling out pregnancy by means of ultrasonography carried out 28 days after insemination or after performing a test for pregnancy-specific glycoproteins (PAG) in blood or milk. The Resynch protocol can be based on a double application of prostaglandins, the OvSynch protocol, or hormonal therapy with exogenous sources of progesterone (CIDR intravaginal devices). The efficiency of the method depends on the functional state of the ovaries, the diameter of the corpus luteum, external factors, and the health and maturity of the cows. The present paper constitutes a comparison of research findings concerning the effectiveness of RES programmes.

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Journal of Veterinary Research

formerly Bulletin of the Veterinary Institute in Pulawy

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IMPACT FACTOR J Vet Res 2017: 0.811

CiteScore 2017: 0.68

SCImago Journal Rank (SJR) 2017: 0.29
Source Normalized Impact per Paper (SNIP) 2017: 0.484


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