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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Gado de Leite. |
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Data corrente: |
17/02/2020 |
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Data da última atualização: |
19/08/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
FIGUEIRA, L. M.; ALVES, N. G.; SOUZA-FABJAN, J. M. G.; OLIVEIRA, M. E. F.; LIMA, R. R.; SOUZA, G. N. de; FONSECA, J. F. da. |
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Afiliação: |
LUCAS MACHADO FIGUEIRA, Universidade Federal de Lavras; NADJA GOMES ALVES, Universidade Federal de Lavras; JOANNA MARIA GONÇALVES SOUZA-FABJAN, Universidade Federal Fluminense Federal; MARIA EMILIA FRANCO OLIVEIRA, Universidade Estadual Paulista "Júlio de Mesquita Filho"; RENATO RIBEIRO LIMA, Universidade Federal de Lavras; GUILHERME NUNES DE SOUZA, CNPGL; JEFERSON FERREIRA DA FONSECA, CNPC. |
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Título: |
Preovulatory follicular dynamics, ovulatory response and embryo yield in Lacaune ewes subjected to synchronous estrus induction protocols and non-surgical embryo recovery. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Theriogenology, v. 145, p. 238-246, 2020. |
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DOI: |
https://doi.org/10.1016/j.theriogenology.2019.11.004 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The objective of this study was to assess the effect of the duration of progesterone-based estrus induction protocols on preovulatory follicular dynamics, ovulatory response, and embryo yield after non-surgical embryo recovery (NSER) in Lacaune ewes. Females received acetate medroxyprogesterone intravaginal sponges for six (G-6; n = 14) or nine (G-9; n = 14) days plus d-cloprostenol and eCG 24 h before sponge removal (Day 0). Preovulatory follicular dynamics and the luteal characteristics are evaluated by B-mode and Color-Doppler ultrasonography. NSER was performed five to six days after ovulation. The estrous behavior rate was 85.7% for both groups, and the percentage of ewes that ovulated was 92.9% in G-6 and 100% in G-9. The day of wave emergence (relative to Day 0) did not differ (P > 0.05) between G-6 (-3.0 ± 0.5) and G-9 (-4.2 ± 0.5). The number of follicles of size 4.1-5.0 mm was higher (P < 0.05) in G-9 (1.4 ± 0.2) compared to G-6 (0.8 ± 0.2) during the Days -4 to 0. At NSER, the transcervical penetration rate was 95.2% (20/21) and its duration time was lower (P < 0.05) in G-9 (3.4 ± 0.6 min) than in G-6 (7.2 ± 1.3 min). The number of ovulations and viable embryos was higher (P < 0.05) in G-9 (2.9 ± 0.3 and 1.3 ± 0.4, respectively) than in G-6 (1.9 ± 0.3 and 0.4 ± 0.2, respectively). In conclusion, the 9-day protocol promoted higher ovulation rate and embryo yield; moreover, the cervical dilation treatment allowed NSER in a high percentage of Lacaune ewes. |
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Palavras-Chave: |
Cervical dilation; Induced ovulation; Ovino leiteiro; Resposta ovulatória; Transcervical embryo recovery; Uterine flushing. |
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Thesagro: |
Ciclo Estral; Indução; Ovelha; Ovulação; Reprodução Animal. |
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Thesaurus NAL: |
Animal reproduction; Brazil; Dairy sheep; Estrous cycle; Estrus synchronization; Ewes. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02781naa a2200409 a 4500
001 2133348
005 2021-08-19
008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.theriogenology.2019.11.004$2DOI
100 1 $aFIGUEIRA, L. M.
245 $aPreovulatory follicular dynamics, ovulatory response and embryo yield in Lacaune ewes subjected to synchronous estrus induction protocols and non-surgical embryo recovery.$h[electronic resource]
260 $c2020
520 $aAbstract: The objective of this study was to assess the effect of the duration of progesterone-based estrus induction protocols on preovulatory follicular dynamics, ovulatory response, and embryo yield after non-surgical embryo recovery (NSER) in Lacaune ewes. Females received acetate medroxyprogesterone intravaginal sponges for six (G-6; n = 14) or nine (G-9; n = 14) days plus d-cloprostenol and eCG 24 h before sponge removal (Day 0). Preovulatory follicular dynamics and the luteal characteristics are evaluated by B-mode and Color-Doppler ultrasonography. NSER was performed five to six days after ovulation. The estrous behavior rate was 85.7% for both groups, and the percentage of ewes that ovulated was 92.9% in G-6 and 100% in G-9. The day of wave emergence (relative to Day 0) did not differ (P > 0.05) between G-6 (-3.0 ± 0.5) and G-9 (-4.2 ± 0.5). The number of follicles of size 4.1-5.0 mm was higher (P < 0.05) in G-9 (1.4 ± 0.2) compared to G-6 (0.8 ± 0.2) during the Days -4 to 0. At NSER, the transcervical penetration rate was 95.2% (20/21) and its duration time was lower (P < 0.05) in G-9 (3.4 ± 0.6 min) than in G-6 (7.2 ± 1.3 min). The number of ovulations and viable embryos was higher (P < 0.05) in G-9 (2.9 ± 0.3 and 1.3 ± 0.4, respectively) than in G-6 (1.9 ± 0.3 and 0.4 ± 0.2, respectively). In conclusion, the 9-day protocol promoted higher ovulation rate and embryo yield; moreover, the cervical dilation treatment allowed NSER in a high percentage of Lacaune ewes.
650 $aAnimal reproduction
650 $aBrazil
650 $aDairy sheep
650 $aEstrous cycle
650 $aEstrus synchronization
650 $aEwes
650 $aCiclo Estral
650 $aIndução
650 $aOvelha
650 $aOvulação
650 $aReprodução Animal
653 $aCervical dilation
653 $aInduced ovulation
653 $aOvino leiteiro
653 $aResposta ovulatória
653 $aTranscervical embryo recovery
653 $aUterine flushing
700 1 $aALVES, N. G.
700 1 $aSOUZA-FABJAN, J. M. G.
700 1 $aOLIVEIRA, M. E. F.
700 1 $aLIMA, R. R.
700 1 $aSOUZA, G. N. de
700 1 $aFONSECA, J. F. da
773 $tTheriogenology$gv. 145, p. 238-246, 2020.
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