Please use this identifier to cite or link to this item:
http://acervodigital.unesp.br/handle/11449/14324
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Vasconcelos, José Luiz Moraes | - |
dc.contributor.author | Jardina, D. T. G. | - |
dc.contributor.author | Sa Filho, O. G. | - |
dc.contributor.author | Aragon, F. L. | - |
dc.contributor.author | Veras, M. B. | - |
dc.date.accessioned | 2013-09-30T18:27:45Z | - |
dc.date.accessioned | 2014-05-20T13:41:19Z | - |
dc.date.accessioned | 2016-10-25T16:56:24Z | - |
dc.date.available | 2013-09-30T18:27:45Z | - |
dc.date.available | 2014-05-20T13:41:19Z | - |
dc.date.available | 2016-10-25T16:56:24Z | - |
dc.date.issued | 2011-04-01 | - |
dc.identifier | http://dx.doi.org/10.1016/j.theriogenology.2010.11.027 | - |
dc.identifier.citation | Theriogenology. New York: Elsevier B.V., v. 75, n. 6, p. 1153-1160, 2011. | - |
dc.identifier.issn | 0093-691X | - |
dc.identifier.uri | http://hdl.handle.net/11449/14324 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/14324 | - |
dc.description.abstract | The objective was to compare two protocols for synchronizing ovulation in lactating Holstein cows submitted to timed AI (TAI) or timed ET (TET). Within each farm (n = 8), cows (n = 883; mean +/- SEM 166.24 +/- 3.27 d postpartum, yielding 36.8 +/- 0.34 kg of milk/d) were randomly assigned to receive either: 1) an intravaginal progesterone insert (CIDR (R)) with 1.9 g of progesterone + GnRH on Day -10, CIDR (R) withdrawal + PGF2 alpha on Day -3, and 1 mg estradiol cypionate on Day -2 (treatment GP-P-E; n(TAI) = 180; n(TET) = 260); or 2) a CIDR (R) insert + 2 mg estradiol benzoate on Day -10, PGF2 alpha on Day -3, CIDR (R) withdrawal + 1 mg estradiol cypionate on Day -2 (treatment EP-P-E; n(TAI) = 174; n(TET) = 269). Cows were subsequently randomly assigned to receive either TAT on Day 0 or TET on Day 7. Serum progesterone concentration on Day -3 was greater in GP-P-E than in EP-P-E (2.89 +/- 0.15 vs 2.29 +/- 0.15 ng/mL; P < 0.01), with no significant effect of group on serum progesterone on Day 7. Compared to cows submitted to TAI, those submitted to TET had greater pregnancy rates on Day 28 (44.0% [233/5291 vs 29.7% [105/354]; p < 0.001) and on Day 60 (37.6% [199/529] vs 26.5 [94/354]; P < 0.001). However, there were no effects of treatments (GP-P-E vs EP-P-E; P > 0.10) on synchronization (87.0% [383/440] vs 85.3% [378/443]), conception (TAI: 35.3% [55/156] vs 33.8% [50/148]; TET: 50.7% [115/227] vs 51.3% [118/230]) and pregnancy rates on Days 28 (TAT: 30.5% [55/180] vs 28.7% 150/174]; TET: 44.2% [115/260] vs 43.9% [118/2691) and 60 (TAI: 27.2% [49/80] vs 25.9% [45/174]; TET: 38.8% [101/260] vs 36.4% [98/269]). In conclusion, GP-P-E increased serum progesterone concentrations on Day -3, but rates of synchronization, conception, and pregnancy were not significantly different between cows submitted to GP-P-E and EP-P-E protocols, regardless of whether they were inseminated or received an embryo. (c) 2011 Elsevier B.V. All rights reserved. | en |
dc.format.extent | 1153-1160 | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier B.V. | - |
dc.source | Web of Science | - |
dc.subject | Artificial insemination | en |
dc.subject | Embryo transfer | en |
dc.subject | Estrus synchronization | en |
dc.subject | GnRH | en |
dc.subject | Estradiol | en |
dc.title | Comparison of progesterone-based protocols with gonadotropin-releasing hormone or estradiol benzoate for timed artificial insemination or embryo transfer in lactating dairy cows | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.contributor.institution | Pioneiros Vet Clin | - |
dc.description.affiliation | UNESP, Fac Med Vet & Zootecnia, Dept Anim Prod, BR-18618000 Botucatu, SP, Brazil | - |
dc.description.affiliation | Pioneiros Vet Clin, BR-84145000 Carambei, PR, Brazil | - |
dc.description.affiliationUnesp | UNESP, Fac Med Vet & Zootecnia, Dept Anim Prod, BR-18618000 Botucatu, SP, Brazil | - |
dc.identifier.doi | 10.1016/j.theriogenology.2010.11.027 | - |
dc.identifier.wos | WOS:000288687500021 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Theriogenology | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.