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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: |
12/02/1996 |
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Data da última atualização: |
13/06/2023 |
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Autoria: |
SCHRICK, F. N.; SURFACE, R. A.; PRITCHARD, J. Y.; DAILEY, R. A.; TOWNSEND, E. C.; INSKEEP, E. K. |
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Título: |
Ovarian structures during the estrous cycle and early pregnancy in ewes. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Biology of Reproduction, v. 49, n. 5, p. 1133-1140, Nov 1993. |
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DOI: |
10.1095/biolreprod49.5.1133 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The development of ovarian follicular and luteal structures during the estrous cycle and early pregnancy in ewes was examined. Ewes were treated with prostaglandin F2 alpha to induce estrus; they were placed with either two fertile or two vasectomized rams and observed for estrus twice daily. Beginning at estrus (Day 0), ovaries were scanned for CL and for follicles > or = 2 mm by transrectal ultrasonography daily for the first 25 days of pregnancy (PREG, n = 17 ewes) or until Day 8 of the second estrous cycle (CYC, n = 15 ewes). Jugular blood samples were collected at ultrasonography and on Days 30, 35, and 40 of gestation for RIA of progesterone and estradiol-17 beta. Total follicles (17.6 +/- 1.3), number of follicles > or = 4 mm in diameter (11.3 +/- 0.6), and number of follicles that became the largest during the first 16 days of pregnancy or the first estrous cycle (4.9 +/- 0.3) did not differ between PREG and CYC ewes. Number of newly detected follicles each day and difference in mean diameter between the largest two follicles and all other follicles were similar between PREG and CYC ewes until luteal regression. At that time, difference in diameter between the largest two follicles and all other follicles increased in CYC ewes in parallel with estradiol-17 beta in serum. Mean concentrations of progesterone in serum were higher in PREG than in CYC ewes (2.4 +/- 0.1 vs. 2.0 +/- 0.1 ng/ml; p < 0.05) before onset of luteal regression, but mean areas of CL did not differ MenosAbstract: The development of ovarian follicular and luteal structures during the estrous cycle and early pregnancy in ewes was examined. Ewes were treated with prostaglandin F2 alpha to induce estrus; they were placed with either two fertile or two vasectomized rams and observed for estrus twice daily. Beginning at estrus (Day 0), ovaries were scanned for CL and for follicles > or = 2 mm by transrectal ultrasonography daily for the first 25 days of pregnancy (PREG, n = 17 ewes) or until Day 8 of the second estrous cycle (CYC, n = 15 ewes). Jugular blood samples were collected at ultrasonography and on Days 30, 35, and 40 of gestation for RIA of progesterone and estradiol-17 beta. Total follicles (17.6 +/- 1.3), number of follicles > or = 4 mm in diameter (11.3 +/- 0.6), and number of follicles that became the largest during the first 16 days of pregnancy or the first estrous cycle (4.9 +/- 0.3) did not differ between PREG and CYC ewes. Number of newly detected follicles each day and difference in mean diameter between the largest two follicles and all other follicles were similar between PREG and CYC ewes until luteal regression. At that time, difference in diameter between the largest two follicles and all other follicles increased in CYC ewes in parallel with estradiol-17 beta in serum. Mean concentrations of progesterone in serum were higher in PREG than in CYC ewes (2.4 +/- 0.1 vs. 2.0 +/- 0.1 ng/ml; p < 0.05) before onset of luteal regression, but mean areas of CL did n... Mostrar Tudo |
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Palavras-Chave: |
Time Factors. |
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Thesagro: |
Ciclo Estral; Ovário; Ovino; Prenhez; Reprodução Animal. |
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Thesaurus Nal: |
Corpus luteum; Females; Ovarian follicles; Ovulation; Physiology; Pregnancy; Progesterone; Reproduction; Sheep; Ultrasonography. |
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Categoria do assunto: |
-- |
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Marc: |
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| 1. |  | FARIAS, S. M. de A. P.; SIVIERO, A.; PEREIRA, K. R. M.; MACEDO, P. E. F. de; SANTOS, R. S.; PASSOS, J. R. de S.; FURTADO, E. L. Degradação biológica e a durabilidade natural de espécies florestais da Amazônia em campo de apodrecimento no Acre. Research, Society and Development, v. 12, n. 4, e10112440990, 2023.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: C - 0 |
| Biblioteca(s): Embrapa Acre. |
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| 2. | | ANGELO, P. C. da S.; CHAVES, F. C. M.; BIZZO, H. R.; XAVIER, J. J. B. N.; CRUZ, J. C. da; COUTO, H. A. R. do; MORAIS, I. da S. de; JANAÍNA, K. G. M.; FARIAS, S. M. de. RAPD como técnica para a distinção entre acessos de sacaca vermelha (Croton cajuçara Benth.) do Banco de Germoplasma da Embrapa Amazônia Ocidental. In: JORNADA AMAZONENSE DE PLANTAS MEDICINAIS, 1., 2005, Manaus. Situação atual, integração e perspectivas no Estado do Amazonas. Manaus: FUCAPI: UFAM: INPA: Embrapa Amazônia Ocidental, 2005. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
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| Registros recuperados : 2 | |
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