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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
09/06/2016 |
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Data da última atualização: |
23/08/2017 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Autoria: |
BALARO, M. F. A.; FONSECA, J. F. da; BARBOSA, T. G. B.; SOUZA-FABJAN, J. M. G.; FIGUEIRA, L. M.; TEIXEIRA, T. A.; CARVALHEIRA, L. R.; BRANDÃO, F. Z. |
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Afiliação: |
Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Animal Science, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil. |
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Título: |
Potential role for GnRH in the synchronization of follicular emergence before the superovulatory Day 0 protocol. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Domestic Animal Endocrinology, Stoneham, v. 54, p. 10-14, Jan. 2016. |
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DOI: |
10.1016/j.domaniend.2015.07.002 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The ability of gonadotropin-releasing hormone (GnRH) to synchronize ovulation and new follicular wave emergence before a "superovulatory Day 0" protocol was assessed in Santa Inês ewes. For estrus synchronization, a 60-mg medroxyprogesterone acetate sponge was inserted for 6 d. One day before sponge removal, 37.5-ug d-cloprostenol and 300 IU equine chorionic gonadotropin were injected intramuscularly (i.m.). After sponge removal, ewes were assigned to the following 3 groups: (1) GC-1 mL saline at 12 h (n = 10); (2) G24h-0.025-mg lecirelin (GnRH agonist) i.m. at 24 h (n = 10); or (3) G36h-0.025-mg lecirelin i.m. at 36 h (n = 9). Ovarian ultrasonography was conducted to assess follicular dynamics. Blood was collected to determine plasma concentrations of progesterone and estradiol. Females from G36h and GC had a greater (P < 0.05) estrous response than those from the G24h group (78.0 and 90.0 vs 0.0%, respectively). Ewes from G24h and G36h had earlier (P < 0.05) ovulation (48.0 ± 10.2 and 56.7 ± 5.7 h) compared with those from Gc (64.1 ± 9.7 h). The mean number of ovulations per ewe was greater (P < 0.05) in Gc (1.9 ± 0.6) and G36h (2.0 ± 1.0) than G24h (1.2 ± 0.4). Plasma concentrations of progesterone and estradiol differed over time. Follicular growth during the postovulatory day was affected (P < 0.05) by day of the estrus cycle as well as by the interaction (P < 0.05) of treatment and day of the estrus cycle. There was a larger (P < 0.05) population of medium follicles during the first 24 h after the ovulation in G24h compared with Gc, and there was an absence of large follicles in G36h between 36 and 72 h after ovulation. In conclusion, the use of GnRH agonist at 36 h more efficiently synchronized ovulation and promoted the absence of dominant follicles during early diestrus and may be used at the start of superovulatory treatment at 80 h in Santa Inês ewes. MenosAbstract: The ability of gonadotropin-releasing hormone (GnRH) to synchronize ovulation and new follicular wave emergence before a "superovulatory Day 0" protocol was assessed in Santa Inês ewes. For estrus synchronization, a 60-mg medroxyprogesterone acetate sponge was inserted for 6 d. One day before sponge removal, 37.5-ug d-cloprostenol and 300 IU equine chorionic gonadotropin were injected intramuscularly (i.m.). After sponge removal, ewes were assigned to the following 3 groups: (1) GC-1 mL saline at 12 h (n = 10); (2) G24h-0.025-mg lecirelin (GnRH agonist) i.m. at 24 h (n = 10); or (3) G36h-0.025-mg lecirelin i.m. at 36 h (n = 9). Ovarian ultrasonography was conducted to assess follicular dynamics. Blood was collected to determine plasma concentrations of progesterone and estradiol. Females from G36h and GC had a greater (P < 0.05) estrous response than those from the G24h group (78.0 and 90.0 vs 0.0%, respectively). Ewes from G24h and G36h had earlier (P < 0.05) ovulation (48.0 ± 10.2 and 56.7 ± 5.7 h) compared with those from Gc (64.1 ± 9.7 h). The mean number of ovulations per ewe was greater (P < 0.05) in Gc (1.9 ± 0.6) and G36h (2.0 ± 1.0) than G24h (1.2 ± 0.4). Plasma concentrations of progesterone and estradiol differed over time. Follicular growth during the postovulatory day was affected (P < 0.05) by day of the estrus cycle as well as by the interaction (P < 0.05) of treatment and day of the estrus cycle. There was a larger (P < 0.05) population of medium fo... Mostrar Tudo |
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Palavras-Chave: |
GnRH; Medroxyprogesterone acetate; MOET; Oestrus synchronization; Raça Santa Inês. |
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Thesagro: |
Ciclo estral; Estradiol; Hormônio animal; Ovino; Ovulação; Progesterona; Sincronização do cio. |
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Thesaurus Nal: |
Ovarian follicles; Ovulation; Progesterone; Sheep; Ultrasonography. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03153naa a2200421 a 4500
001 2046656
005 2017-08-23
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1016/j.domaniend.2015.07.002$2DOI
100 1 $aBALARO, M. F. A.
245 $aPotential role for GnRH in the synchronization of follicular emergence before the superovulatory Day 0 protocol.$h[electronic resource]
260 $c2016
520 $aAbstract: The ability of gonadotropin-releasing hormone (GnRH) to synchronize ovulation and new follicular wave emergence before a "superovulatory Day 0" protocol was assessed in Santa Inês ewes. For estrus synchronization, a 60-mg medroxyprogesterone acetate sponge was inserted for 6 d. One day before sponge removal, 37.5-ug d-cloprostenol and 300 IU equine chorionic gonadotropin were injected intramuscularly (i.m.). After sponge removal, ewes were assigned to the following 3 groups: (1) GC-1 mL saline at 12 h (n = 10); (2) G24h-0.025-mg lecirelin (GnRH agonist) i.m. at 24 h (n = 10); or (3) G36h-0.025-mg lecirelin i.m. at 36 h (n = 9). Ovarian ultrasonography was conducted to assess follicular dynamics. Blood was collected to determine plasma concentrations of progesterone and estradiol. Females from G36h and GC had a greater (P < 0.05) estrous response than those from the G24h group (78.0 and 90.0 vs 0.0%, respectively). Ewes from G24h and G36h had earlier (P < 0.05) ovulation (48.0 ± 10.2 and 56.7 ± 5.7 h) compared with those from Gc (64.1 ± 9.7 h). The mean number of ovulations per ewe was greater (P < 0.05) in Gc (1.9 ± 0.6) and G36h (2.0 ± 1.0) than G24h (1.2 ± 0.4). Plasma concentrations of progesterone and estradiol differed over time. Follicular growth during the postovulatory day was affected (P < 0.05) by day of the estrus cycle as well as by the interaction (P < 0.05) of treatment and day of the estrus cycle. There was a larger (P < 0.05) population of medium follicles during the first 24 h after the ovulation in G24h compared with Gc, and there was an absence of large follicles in G36h between 36 and 72 h after ovulation. In conclusion, the use of GnRH agonist at 36 h more efficiently synchronized ovulation and promoted the absence of dominant follicles during early diestrus and may be used at the start of superovulatory treatment at 80 h in Santa Inês ewes.
650 $aOvarian follicles
650 $aOvulation
650 $aProgesterone
650 $aSheep
650 $aUltrasonography
650 $aCiclo estral
650 $aEstradiol
650 $aHormônio animal
650 $aOvino
650 $aOvulação
650 $aProgesterona
650 $aSincronização do cio
653 $aGnRH
653 $aMedroxyprogesterone acetate
653 $aMOET
653 $aOestrus synchronization
653 $aRaça Santa Inês
700 1 $aFONSECA, J. F. da
700 1 $aBARBOSA, T. G. B.
700 1 $aSOUZA-FABJAN, J. M. G.
700 1 $aFIGUEIRA, L. M.
700 1 $aTEIXEIRA, T. A.
700 1 $aCARVALHEIRA, L. R.
700 1 $aBRANDÃO, F. Z.
773 $tDomestic Animal Endocrinology, Stoneham$gv. 54, p. 10-14, Jan. 2016.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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Registro |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
17/08/1999 |
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Data da última atualização: |
10/08/2009 |
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Autoria: |
SEIFFERT, N. F.; THIAGO, L. R. L. de S. |
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Afiliação: |
EMBRAPA. Centro Nacional de Pesquisa de Gado de Corte (Campo Grande, MS). |
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Título: |
A planta forrageira guandu (I). |
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Ano de publicação: |
1984 |
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Fonte/Imprenta: |
O Estado de Sao Paulo, Sao Paulo, 1 ago., 1984. Suplemento Agricola, n.1510, p.16. |
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Idioma: |
Português |
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Notas: |
CNPGC. |
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Palavras-Chave: |
Banco de proteina; Brasil; Central Brazil; Protein bank. |
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Thesagro: |
Bovino; Cajanus Cajan; Cerrado; Guandu; Nutrição. |
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Thesaurus NAL: |
cattle; nutrition. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00677naa a2200265 a 4500
001 1320707
005 2009-08-10
008 1984 bl uuuu u00u1 u #d
100 1 $aSEIFFERT, N. F.
245 $aA planta forrageira guandu (I).
260 $c1984
500 $aCNPGC.
650 $acattle
650 $anutrition
650 $aBovino
650 $aCajanus Cajan
650 $aCerrado
650 $aGuandu
650 $aNutrição
653 $aBanco de proteina
653 $aBrasil
653 $aCentral Brazil
653 $aProtein bank
700 1 $aTHIAGO, L. R. L. de S.
773 $tO Estado de Sao Paulo, Sao Paulo, 1 ago., 1984. Suplemento Agricola$gn.1510, p.16.
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