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Effectiveness of a low-dose Norgestomet ear implant in short-term protocols to induce estrus in ewes during the non-breeding season in Brazil. R. Bras. Zootec.
Lima Júnior,Dayrton Farias; Barreto,José Victor Pronievicz; Sterza,Fabiana de Andrade Melo; Souza-Cáceres,Mirela Brochado; Pontes,Vanessa Pereira; Zundt,Marilice; Castilho,Caliê; Cunha Filho,Luiz Fernando Coelho da.
ABSTRACT The objective of this study was to evaluate the reproductive performance of ewes subjected to a short-term protocol for estrus induction using 1 mg of Norgestomet during the non-breeding season in Brazil. A total of 84 ewes were randomly divided into two equal groups (n = 42 per group). Controlled Internal Drug Release (CIDR) containing 330 mg progesterone was inserted into the vagina in the first 42 ewes, and for the other 42 ewes in the second group, 1 mg of Norgestomet was placed subcutaneously in the convex surface of the ear. Implants and devices were removed in both groups on day 6. Following the removal of implants and devices, 10 mg of PGF2α and 300 IU of eCG were injected in all the ewes. After 48 h of application, three fertile rams were...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Animal breeding; Ovine; Progesterone; Reproductive traits; Sheep; Synchronization of estrus.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100603
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