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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: |
01/08/1992 |
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Data da última atualização: |
03/05/2023 |
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Autoria: |
ROBERTS, J. S. |
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Título: |
Cylical fluctuations in reflexive oxytocin Release during the estrous cycle of the goat. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Biology of Reproduction, v. 13, n. 3, p. 314-317, Oct. 1975. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Elevations in the circulating level of oxytocin resulting from stimulation of the vagina were determined repeatedly in each of 23 estrous cycles. To delineate the course of each cycle, the day of behavioral estrus was determined and radioimmunoassayable serum progesterone was measured every 2 days. Vaginal stimulation induced greater elevations in the level of oxytocin near the time of estrus and during the early luteal phase than during periods characterized by maximal concentrations of progesterone. Elevations averaged 25.2 ± 8.8 µU/ml plasma in the early luteal phase and then declined progressively, reaching a minimum of 4.2 ± 1.7 µU/ml shortly before progesterone levels fell prior to estrus. This cyclic variation in the oxytocin-elevating effect of vaginal stimulation, viewed in the light of previous studies that have shown strong effects of exogenous ovarian steroids on oxytocin release, suggests that fluctuations in endogenous ovarian hormones during the estrous cycle may influence the oxyotocin secretory mechanism. |
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Palavras-Chave: |
Fisologia; Oestrous cycle. |
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Thesagro: |
Caprino; Ciclo Estral; Endocrinologia; Reprodução. |
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Thesaurus Nal: |
Animal physiology; Endocrinology; Goats; Oxytocin; Reproduction. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01757naa a2200253 a 4500
001 1520555
005 2023-05-03
008 1975 bl uuuu u00u1 u #d
100 1 $aROBERTS, J. S.
245 $aCylical fluctuations in reflexive oxytocin Release during the estrous cycle of the goat.$h[electronic resource]
260 $c1975
520 $aAbstract: Elevations in the circulating level of oxytocin resulting from stimulation of the vagina were determined repeatedly in each of 23 estrous cycles. To delineate the course of each cycle, the day of behavioral estrus was determined and radioimmunoassayable serum progesterone was measured every 2 days. Vaginal stimulation induced greater elevations in the level of oxytocin near the time of estrus and during the early luteal phase than during periods characterized by maximal concentrations of progesterone. Elevations averaged 25.2 ± 8.8 µU/ml plasma in the early luteal phase and then declined progressively, reaching a minimum of 4.2 ± 1.7 µU/ml shortly before progesterone levels fell prior to estrus. This cyclic variation in the oxytocin-elevating effect of vaginal stimulation, viewed in the light of previous studies that have shown strong effects of exogenous ovarian steroids on oxytocin release, suggests that fluctuations in endogenous ovarian hormones during the estrous cycle may influence the oxyotocin secretory mechanism.
650 $aAnimal physiology
650 $aEndocrinology
650 $aGoats
650 $aOxytocin
650 $aReproduction
650 $aCaprino
650 $aCiclo Estral
650 $aEndocrinologia
650 $aReprodução
653 $aFisologia
653 $aOestrous cycle
773 $tBiology of Reproduction$gv. 13, n. 3, p. 314-317, Oct. 1975.
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