Comparison of three doses of estradiol benzoate for synchronization of follicular wave emergence in suckled Bos indicus beef cows

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorAgência Paulista de Tecnologia dos Agronegócios-
Autor(es): dc.creatorSilva, Amanda Guimarães-
Autor(es): dc.creatorPinto, Leonardo Marin Ferreira-
Autor(es): dc.creatorde Amorim Silva, Nadark-
Autor(es): dc.creatorMattos, Ana Clara Degan-
Autor(es): dc.creatorAmbrósio, Pablo Henrique-
Autor(es): dc.creatorDuarte, Keila Maria Roncato-
Autor(es): dc.creatorAlvarez, Rafael Herrera-
Autor(es): dc.creatorPugliesi, Guilherme-
Data de aceite: dc.date.accessioned2025-08-21T16:16:14Z-
Data de disponibilização: dc.date.available2025-08-21T16:16:14Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/1984-3143-AR2021-0016-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/231506-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/231506-
Descrição: dc.descriptionWe aimed to compare the effect of three estradiol benzoate (EB) doses on follicular wave emergence (FWE) and dominant follicle growth of suckled Nelore cows submitted to TAI (D0). On a random day of estrous cycle (D−10), multiparous (MULT; n=36) and primiparous (PRIM; n=20) suckled Nelore cows received an intravaginal progesterone (P4) device and were assigned in three groups. Cows in the EB-1 (n=20), EB-1.5 (n=15) or EB-2 (n=21) groups received, respectively, an im treatment with 1, 1.5 or 2 mg EB. A subgroup (n=10-13 cows/group) were subject to daily ovarian evaluations from D−10 to D0. On D−2, P4 devices were removed, and all cows received the same treatment: 1 mg estradiol cypionate,0.53 mg sodium cloprostenol, and 300 IU eCG. Statistical analyses were performed considering only the= main effects of treatment group and parity order. The proportion of cows with a synchronized FWE and the moment of the FWE did not differ (p>0.05) among the treatment groups (overall: 80% [28/35] and 4.1 ± 0.4 days); however, the FWE occurred earlier (p=0.007) in MULT (3.8 ± 0.2 days) than PRIM (5.1 ± 0.4) cows. The proportion of animals detected in estrus was greater (86% [31/36] vs. 70% [14/20]; p=0.02) and the dominant follicle was larger on D−2 (9.7 ± 0.3 mm vs. 7.8 ± 0.7 mm; p=0.006) and D0 (11.9 ± 0.4 mm vs. 10 ± 0.5 mm; p=0.008) in MULT than PRIM cows. In conclusion, the three EB doses presented similar efficiency to synchronize the FWE in suckled Nelore cows. Moreover, a delayed FWE and smaller dominant follicle is observed in PRIM cows, contributing to the reduced reproductive performance in this parity category when using similar TAI protocols of MULT cows-
Descrição: dc.descriptionDepartamento de Reprodução Animal Faculdade de Medicina Veterinária e Zootecnia Universidade de São Paulo-
Descrição: dc.descriptionFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista “Júlio de Mesquita Filho”-
Descrição: dc.descriptionUnidade de Pesquisa e Desenvolvimento Tietê Agência Paulista de Tecnologia dos Agronegócios-
Descrição: dc.descriptionFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista “Júlio de Mesquita Filho”-
Formato: dc.format1-8-
Idioma: dc.languageen-
Relação: dc.relationAnimal Reproduction-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBos indicus-
Palavras-chave: dc.subjectcattle-
Palavras-chave: dc.subjectestradiol benzoate-
Palavras-chave: dc.subjectfollicular dynamics-
Palavras-chave: dc.subjectmultiparous-
Palavras-chave: dc.subjectprimiparous-
Título: dc.titleComparison of three doses of estradiol benzoate for synchronization of follicular wave emergence in suckled Bos indicus beef cows-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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