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Preovulatory follicular dynamics, ovulatory response and embryo yield in Lacaune ewes subjected to synchronous estrus induction protocols and non-surgical embryo recovery.
Figueira, Lucas Machado; Alves, Nadja Gomes; Souza-Fabjan, Joanna Maria Gonçalves; Oliveira, Maria Emilia Franco; Lima, Renato Ribeiro; Souza, Guilherme Nunes; Fonseca, Jeferson Ferreira.
Afiliación
  • Figueira LM; Universidade Federal de Lavras, Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-000, Lavras, MG, Brazil; Universidade Federal Fluminense Federal, Rua Vital Brazil Filho, 64, CEP 24220-008, Niterói-RJ, Brazil.
  • Alves NG; Universidade Federal de Lavras, Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-000, Lavras, MG, Brazil. Electronic address: nadja@ufla.br.
  • Souza-Fabjan JMG; Universidade Federal Fluminense Federal, Rua Vital Brazil Filho, 64, CEP 24220-008, Niterói-RJ, Brazil.
  • Oliveira MEF; Universidade Estadual Paulista "Júlio de Mesquita Filho", Via de Acesso Prof. Paulo Donato Castelane, s/n, Zona Rural, CEP 14884-900, Jaboticabal, SP, Brazil.
  • Lima RR; Universidade Federal de Lavras, Av. Doutor Sylvio Menicucci, 1001 - Kennedy, CEP 37200-000, Lavras, MG, Brazil.
  • Souza GN; Universidade Federal Fluminense Federal, Rua Vital Brazil Filho, 64, CEP 24220-008, Niterói-RJ, Brazil; Embrapa Gado de Leite, Rua Eugênio do Nascimento, 610 - Dom Bosco, CEP 36038-330, Juiz de Fora, MG, Brazil.
  • Fonseca JF; Embrapa Caprinos e Ovinos, Estrada Sobral/Groaíras, Km 4, CP D10, CEP 62011-000, Sobral, CE, Brazil. Electronic address: jeferson.fonseca@embrapa.br.
Theriogenology ; 145: 238-246, 2020 Mar 15.
Article en En | MEDLINE | ID: mdl-31753477
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 ±â€¯0.5) and G-9 (-4.2 ±â€¯0.5). The number of follicles of size 4.1-5.0 mm was higher (P < 0.05) in G-9 (1.4 ±â€¯0.2) compared to G-6 (0.8 ±â€¯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 ±â€¯0.6 min) than in G-6 (7.2 ±â€¯1.3 min). The number of ovulations and viable embryos was higher (P < 0.05) in G-9 (2.9 ±â€¯0.3 and 1.3 ±â€¯0.4, respectively) than in G-6 (1.9 ±â€¯0.3 and 0.4 ±â€¯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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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ovulación / Ovinos / Recolección de Tejidos y Órganos / Sincronización del Estro / Folículo Ovárico Tipo de estudio: Guideline Límite: Animals Idioma: En Revista: Theriogenology Año: 2020 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ovulación / Ovinos / Recolección de Tejidos y Órganos / Sincronización del Estro / Folículo Ovárico Tipo de estudio: Guideline Límite: Animals Idioma: En Revista: Theriogenology Año: 2020 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos