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| Demeterco,Danilo; Henry,Darren Dwayne; Mercadante,Vitor Rodrigues Gomes; Lamb,Graham Cliff; Gaievski,Francisco Romano; Weiss,Bruno; Turbay,Gustavo Nascimento; Segui,Márcio Saporski; Weiss,Romildo Romualdo; Betiol,Melina Andreia Formighieri; Kozicki,Luiz Ernandes. |
| The effect of an intramuscular versus intravenous administration of gonadotropin releasing hormone (GnRH) at fixed-time AI (FTAI) on the pregnancy rates of crossbred Bos indicus beef cows was evaluated. Pluriparous nursing calv cows (n=120) were synchronized as follows: d 0 cows received a 2.0 mg injection of estradiol benzoate (EB) and insertion of a controlled intravaginal progesterone releasing device containing 0.558 g of progesterone, d 8 removal of the progesterone device , a 0.15 mg injection of prostaglandin F2α (PGF), a 1.0 mg injection of EB, and 400 IU injection of equine chorionic gonadotropin. Fifty-four hr after PGF, all cows were exposed to FTAI and a 0.084 mg injection of GnRH was administered either via Vena caudalis (n=60), or via... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gonadotropin releasing hormone; Fixed-time artificial insemination; Intravenous intramuscular administration. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000300008 |
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