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| Maffi,Andressa Stein; Luz,Gabriela Bueno; Gasperin,Bernardo Garziera; Mattos,Raine Fonseca; Xavier,Eduardo Gularte; Corrêa,Marcio Nunes; Brauner,Cássio Cassal. |
| ABSTRACT: The aim of this study was to evaluate the economic viability of the use of a lactation induction protocol in Holstein heifers. Were collected data of nutritional, reproductive and sanitary management pre and post-lactation period from 30 induction heifers (IG) and 30 pregnant heifers (CG). All animals were inseminated around 14 months of age and started lactation at 23±4 months. The animals of IG were heifers do not pregnant after two inseminations and natural service e were induced to lactation according to protocol: from the 1st to the 8th day, 30 mg of estradiol benzoate were administered daily, together with 300 mg of progesterone. From the 9th until the 14th, animals only received daily doses of 20 mg estradiol benzoate. On 16th day, 0.56... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Economic viability; Heifers; Induced lactation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001200701 |
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| Maffi,Andressa Stein; Brauner,Cássio Cassal; Mielke,Lais Fernanda; Lima,Marcio Erpen; Xavier,Eduardo Gularte; Pino,Francisco Augusto Burkert Del; Corrêa,Marcio Nunes. |
| ABSTRACT: The objective of this study was to evaluate the effect of exogenous insulin administration on follicular growth, estrus presentation and conception rate during a protocol of ovulation synchronization. Dairy cows were subjected to the Heatsynch protocol, with the insertion of an intravaginal device containing 1.9 g of progesterone (CIDR) and an intramuscular injection containing 2.5 mg of GnRH on day 0. On day 7, the CIDR was removed and subjects were given 12.5 mg of dinoprost. Also on day 7, Insulin Group (IG, n = 21) animals received a subcutaneous injection containing 0.25 IU / kg of recombinant human insulin and the control group (CG, n = 25) received a 0.9% NaCl injection. On day 8, an injection of 0.5 mg of estradiol cypionate was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cow; Insulin; Ovarian follicle; Reproduction. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000800650 |
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| Schneider,Augusto; Pfeifer,Luiz Francisco Machado; Schmitt,Eduardo; Bianchi,Ivan; Vieira,Marcelo Brandi; Xavier,Eduardo Gularte; Del Pino,Francisco Augusto Burkert; Corrêa,Marcio Nunes. |
| The objective of this work was to evaluate the effect of insulin alone or in association with equine chorionic gonadotropin (eCG) on the fertility of postpartum beef cows subjected to synchronization. A total of 340 cows was subjected to fixed time artificial insemination. In the trial 1, the cows were subjected to temporary weaning (TW), while in the trial 2 the same protocol was tested without TW. The addition of an insulin injection to a progesterone/eCG-based protocol without TW increased the pregnancy rate of beef cows with body condition score (BCS) equal to or lower than 2.5. Insulin had no effect on cows submitted to TW or with BCS equal to or higher than 3.0. |
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Palavras-chave: Bos taurus; ECG; Insulin; FTAI; Weaning. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001000023 |
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