Administering an additional prostaglandin F2α injection to Bos indicus beef cows during a treatment regimen for fixed-time artificial insemination

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorTexas A&M University-
Autor(es): dc.contributorAgropecuária Fazenda Brasil-
Autor(es): dc.creatorNoronha, Isabella M. [UNESP]-
Autor(es): dc.creatorCooke, Reinaldo F.-
Autor(es): dc.creatorMartins, Cícero F.G.-
Autor(es): dc.creatorOliveira Filho, Ramiro V.-
Autor(es): dc.creatorPohler, Ky G.-
Autor(es): dc.creatorVasconcelos, José L.M. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:26:20Z-
Data de disponibilização: dc.date.available2022-02-22T00:26:20Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.anireprosci.2020.106535-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199055-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199055-
Descrição: dc.descriptionTwo experiments were conducted to evaluate if an additional prostaglandin F2α (PG) injection during an estradiol-based estrous synchronization treatment regimen affects pregnancy rates resulting from fixed-time artificial insemination (FTAI) in Nelore cows. In Experiment 1, 1039 cows were administered estradiol benzoate and an intravaginal progesterone releasing device (CIDR) on d -11, an injection of PG on d -4, with CIDR removal and administration of estradiol cypionate and eCG occurring on d -2, and FTAI on d 0. Cows were administered an additional injection of PG (PG2) or saline (PG1) on d -2. Percentage pregnancy per FTAI on d 30 was greater (P = 0.01) in cows of the PG2 than PG1 group (54.5 % and 46.6 %, respectively). In Experiment 2, there was use of the same treatment regimen for estrous synchronization of 934 cows as that for Experiment 1 followed by FTAI, with there being diagnosis of whether cows had or did not have a corpus luteum on d -4. Response to estrous synchronization, largest follicle diameter at FTAI, and pregnancy per FTAI were greater (P ≤ 0.05) in cows of the PG2 than PG1 group with a body condition score (BCS) < 5.0 at FTAI (81.2 % and 72.6 %, 11.9 and 11.2 mm, 55.5 and 45.6 %; respectively). These treatment responses did not differ (P ≥ 0.18) in cows with BCS ≥ 5.0. Collectively, results indicate that treatment with PG2 increased pregnancy per FTAI in B. indicus cows deficient in body energy reserves, by enhancing follicle development and estrous synchronization response.-
Descrição: dc.descriptionSchool of Veterinary Medicine and Animal Science Sao Paulo State University (UNESP)-
Descrição: dc.descriptionDepartment of Animal Science Texas A&M University-
Descrição: dc.descriptionAgropecuária Fazenda Brasil-
Descrição: dc.descriptionSchool of Veterinary Medicine and Animal Science Sao Paulo State University (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationAnimal Reproduction Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBeef cows-
Palavras-chave: dc.subjectFixed-time artificial insemination-
Palavras-chave: dc.subjectPregnancy-
Palavras-chave: dc.subjectProstaglandin F2α-
Título: dc.titleAdministering an additional prostaglandin F2α injection to Bos indicus beef cows during a treatment regimen for fixed-time artificial insemination-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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