Idioma:

Ability of induced corpora lutea to maintain pregnancy in beef cows

Bridges, P. J ; Wright, D. J ; Buford, W. I ; Ahmad, N ; Hernandez-Fonseca, H ; McCormick, M. L ; Schrick, F. N ; Dailey, R. A ; Lewis, P. E ; Inskeep, E. K

Journal of animal science, 2000-11, Vol.78 (11), p.2942-2949 [Periódico revisado por pares]

Savoy, IL: Am Soc Animal Sci

Texto completo disponível

Citações Citado por

Enviar para

Título:
Ability of induced corpora lutea to maintain pregnancy in beef cows
Autor: Bridges, P. J ; Wright, D. J ; Buford, W. I ; Ahmad, N ; Hernandez-Fonseca, H ; McCormick, M. L ; Schrick, F. N ; Dailey, R. A ; Lewis, P. E ; Inskeep, E. K
Assuntos: Animal productions ; Animals ; Biological and medical sciences ; Cattle ; Cattle - physiology ; Cattle Diseases - etiology ; Chorionic Gonadotropin - pharmacology ; Corpus Luteum - physiology ; Dinoprost - blood ; Embryos ; Female ; Fetal Death - etiology ; Fetal Death - veterinary ; Fundamental and applied biological sciences. Psychology ; Hormone metabolism and regulation ; Hormones ; Mortality ; Pregnancy ; Pregnancy, Animal - physiology ; Pregnancy. Parturition. Lactation ; Progesterone - blood ; Terrestrial animal productions ; Vertebrates ; Vertebrates: reproduction
É parte de: Journal of animal science, 2000-11, Vol.78 (11), p.2942-2949
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Experiments were conducted in beef cows without a primary CL, in which pregnancy had been maintained with exogenous progestogen. In preliminary trials, replacement CL induced ipsilateral to the embryo and after, rather than before, d 36 of pregnancy, maintained more pregnancies after withdrawal of exogenous progestogen (13/13 vs 2/6; P < 0.05). In Exp. 1, in cows with replacement CL induced by treatment with hCG on d 28 of pregnancy, treatment with flunixin meglumine on d 31 through 37 did not increase maintenance of pregnancy. Experiment 2 was conducted to evaluate directly the effects of concentrations of PGF2alpha and estradiol-17beta during d 31 through 35 of pregnancy on maintenance of pregnancy by replacement CL induced between d 28 and 31. In cows that maintained pregnancy while progestogen was provided, maintenance of pregnancy after withdrawal of exogenous progestogen tended to be greater with high (5/5) than with low (2/6; P < 0.10) concentrations of PGF2alpha and greater with low (6/7) than with high (2/6; P = 0.10) concentrations of estradiol-17beta. Secretion of progesterone by replacement CL was greater (P < 0.05) in cows with high than in those with low concentrations of PGF2, during d 31 through 35. Prostaglandin F2alpha may facilitate attachment of the bovine embryo (d 30 to 40) in a manner similar to that reported for implantation in other species. Cows that did not form CL in response to hCG on d 28 to 31 responded well when retreated after d 36. Again, maintenance of pregnancy was greater when replacement CL were induced after (9/9) rather than before d 36 (8/16; P < 0.05).
Editor: Savoy, IL: Am Soc Animal Sci
Idioma: Inglês

Links

Voltar para lista de resultados

Realização: Logos de Redes Sociais:

Ability of induced corpora lutea to maintain pregnancy in beef cows

Bridges, P. J ; Wright, D. J ; Buford, W. I ; Ahmad, N ; Hernandez-Fonseca, H ; McCormick, M. L ; Schrick, F. N ; Dailey, R. A ; Lewis, P. E ; Inskeep, E. K

Savoy, IL: Am Soc Animal Sci

Buscando em bases de dados remotas. Favor aguardar.