Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139496
Registro completo de metadados
Campo DCValorIdioma
dc.contributor.authorDINIZ, J. V. A.
dc.contributor.authorDELL'AQUA JUNIOR, J. A.
dc.contributor.authorOBA, E.
dc.contributor.authorFREITAS, R. R. de
dc.contributor.authorPEIXOTO, R. M.
dc.contributor.authorSILVA, L. O.
dc.contributor.authorMAIA, G. F. N. M.
dc.contributor.authorCARVALHO, B. P.
dc.contributor.authorLOUREIRO, B.
dc.contributor.authorSATRAPA, R. A.
dc.date.accessioned2022-01-31T16:01:19Z-
dc.date.available2022-01-31T16:01:19Z-
dc.date.created2022-01-31
dc.date.issued2021
dc.identifier.citationActa Scientiae Veterinariae, v. 49, 1828, 2021.
dc.identifier.issn1678-0345 (impresso) / 1679-9216 (online)
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1139496-
dc.descriptionProgesterone (P4) is essential for embryonic development and maintenance of pregnancy when deficiency causes early embryonic loss. In this study, we investigated the ability of hormonal supplementation to improve the fertility of Nellore females subjected to fixed-time artificial insemination (IATF) protocols. Here, we evaluated the effect of long-acting injectable progesterone (iP4) supplementation in the D4 after IATF on pregnancy rate and pregnancy loss in Nellore females (Bos taurus indicus) from different reproductive categories in Western Amazonia. Materials, Methods & Results: Eight hundred thirteen Nellore females from 5 farms were selected and distributed into 2 groups: control [GC; administration of 0.5 mL of 0.9% saline solution, intramuscularly - IM] (n = 407) and a group that received injectable progesterone (iP4) that was long-acting [GiP4; administration of 0.5 mL of iP4, 300 mg, via IM four days after IATF] (n = 406). Each group contained 3 subgroups: heifers, primiparous cows, and multiparous cows. Of the 407 animals in the CG, 103 were heifers, 107 primiparous, and 197 multiparous. Of the 406 animals in the GiP4 group, there were 101 heifers, 107 primiparous, and 198 multiparous. On a random day of the estrous cycle (D0), an intravaginal device containing 1 g of P4 and 2 mg of estradiol benzoate (BE) was inserted by intramuscular injection. On D8, the P4 device was removed and 150 &#956;g of D-cloprostenol (PGF2&#945;), 300 IU eCG, and 1 mg BE were administered IM. Cows were inseminated at D10, 48-52 h after procedure on D8. Pregnancy diagnosis was made between 35 and 40 days after insemination through ultrasound examination. Between 80 and 90 days after insemination, a new ultrasound examination was performed to assess early pregnancy loss. The data were processed using the SAS 9.2. The conception rate, pregnancy loss, and final conception rate were analyzed using PROC GLIMMIX according to groups (CG and GiP4), categories (heifers, primiparous and multiparous), and their interactions as variables. The differences in the means of least squares were adjusted using the Tukey?Kramer method. Statistical significance was defined as P < 0.05. The general conception rate was 46% (375/816). Regardless of the animal class, GiP4 animals (51.97%) had higher conception rates (P < 0.05) than CG (40.29%). In the subgroups (heifers, primiparous and multiparous cows), there was a difference (P < 0.05) between animals treated with iP4 (52.48%, 57.94%, and 48.48%, respectively) and those who were not (39.81%, 41.12%, and 40.10%, respectively). Gestational losses, regardless of the animal class, were higher in females in the CG (7.93%) [P < 0.05] compared to those in the GiP4 group (2.84%). Regardless of treatment with iP4, the percentage of gestational loss in heifers was significantly higher (10.64%) than that in primiparous and multiparous cows (3.77% and 2.86%, respectively). The final conception rates were higher in animals that received long-acting iP4, which increased the final pregnancy in all parity categories. Discussion: In the present study, the use of iP4 increased the pregnancy rate in Nellore females, regardless of the category. Although there has been no consensus on the use of iP4, there is an agreement that increases in the pregnancy rate are related to the moment of exogenous P4 application. In addition to influencing the pregnancy rate, reduction in pregnancy losses is also attributed to iP4 treatment, a fact demonstrated in the present study, where animals treated with iP4 had a lower pregnancy loss rate than normally occurs in beef cattle. Supplementation with long-acting iP4 increased the pregnancy rate at D35-40, reduced pregnancy losses, and increased the conception rate on D80-90 days in Nellore females reared in the Western Amazon, regardless of the animal category.
dc.language.isopor
dc.rightsopenAccess
dc.subjectReproducción de animalespt_BR
dc.subjectFertilidad animalpt_BR
dc.subjectGanado de carnept_BR
dc.subjectVacas para carnept_BR
dc.subjectOvulaciónpt_BR
dc.subjectInseminación artificialpt_BR
dc.subjectHormonas progestacionalespt_BR
dc.subjectMétodos de mejoramiento genéticopt_BR
dc.titleInfluência da progesterona injetável na taxa de prenhez e perda gestacional de fêmeas nelore de distintas categorias reprodutivas submetidas a inseminação artificial em tempo fixo.
dc.typeArtigo de periódico
dc.subject.thesagroReprodução Animal
dc.subject.thesagroFertilidade Animal
dc.subject.thesagroHormônio
dc.subject.thesagroProgesterona
dc.subject.thesagroPrenhez
dc.subject.thesagroGado de Corte
dc.subject.thesagroGado Nelore
dc.subject.thesagroVaca de Corte
dc.subject.thesagroOvulação
dc.subject.thesagroInseminação Artificial
dc.subject.nalthesaurusProgestational hormonespt_BR
dc.subject.nalthesaurusAnimal breedingpt_BR
dc.subject.nalthesaurusBreeding methodspt_BR
dc.subject.nalthesaurusProgesteronept_BR
dc.subject.nalthesaurusAnimal reproductionpt_BR
dc.subject.nalthesaurusAnimal fertilitypt_BR
dc.subject.nalthesaurusBeef cattlept_BR
dc.subject.nalthesaurusBeef cowspt_BR
dc.subject.nalthesaurusNellorept_BR
dc.subject.nalthesaurusOvulationpt_BR
dc.subject.nalthesaurusArtificial inseminationpt_BR
riaa.ainfo.id1139496
riaa.ainfo.lastupdate2022-01-31
dc.identifier.doi10.22456/1679-9216.113632
dc.contributor.institutionJEFFERSON VIANA ALVES DINIZ, Universidade Estadual Paulista “Julio Mesquita Filho” (UNESP)
dc.contributor.institutionJOSÉ ANTONIO DELL'AQUA JUNIOR, Universidade Estadual Paulista ?Julio Mesquita Filho? (UNESP)pt_BR
dc.contributor.institutionEUNICE OBA, Universidade Estadual Paulista “Julio Mesquita Filho” (UNESP)pt_BR
dc.contributor.institutionROSANO RAMOS DE FREITAS, Universidade Federal do Acre (UFAC)pt_BR
dc.contributor.institutionRENATO MESQUITA PEIXOTO, CNPCOpt_BR
dc.contributor.institutionLAINE OLIVEIRA SILVA, Universidade Federal do Acre (UFAC)pt_BR
dc.contributor.institutionGERBSON FRANCISCO NOGUEIRA MAIA, Universidade Federal do Acre (UFAC)pt_BR
dc.contributor.institutionBRUNO PENA CARVALHO, CPAF-ACpt_BR
dc.contributor.institutionBÁRBARA LOUREIRO, Universidade de Vila Velha (UVV)pt_BR
dc.contributor.institutionRAFAEL AUGUSTO SATRAPA, Universidade Federal do Acre (UFAC).pt_BR
Aparece nas coleções:Artigo em periódico indexado (CPAF-AC)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
27293.pdf179,45 kBAdobe PDFThumbnail
Visualizar/Abrir

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace