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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: |
29/11/2023 |
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Autoria: |
BENGTSSON, L. PH.; SCHOFIELD, B. M. |
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Título: |
Hormonal control of myometrial function during pregnancy in the sheep. |
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Ano de publicação: |
1960 |
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Fonte/Imprenta: |
Journal of Reproduction and Fertility, v. 1, n. 4, p. 402-409, Nov., 1960. |
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DOI: |
10.1530/jrf.0.0010402 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: In a series of thirteen sheep, experiments were carried out during the last month of pregnancy to assess the extent of progesterone influence on the myometrium. Staircase effects were recorded from the longitudinal fibres of the myometrium in the intact ewe and also in vitro, and the threshold dose of oxytocin required to elicit a contraction was determined. The results, both in vivo and in vitro, demonstrate that the progesterone influence declines before parturition and it is concluded that the extrusion of the foetus is accomplished by an oestrogendominated myometrium. This finding is discussed in relation to the fact that no fall in the progesterone level in blood can be detected before parturition. The oxytocin thresholds determined in vivo suggest that the sensitivity of the myometrium increases with the approach to parturition. |
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Thesagro: |
Endocrinologia; Obstetrícia; Ovino; Reprodução. |
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Thesaurus Nal: |
Endocrinology; Pregnancy; Progesterone; Reproduction; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01574naa a2200253 a 4500
001 1520175
005 2023-11-29
008 1960 bl uuuu u00u1 u #d
024 7 $a10.1530/jrf.0.0010402$2DOI
100 1 $aBENGTSSON, L. PH.
245 $aHormonal control of myometrial function during pregnancy in the sheep.$h[electronic resource]
260 $c1960
520 $aAbstract: In a series of thirteen sheep, experiments were carried out during the last month of pregnancy to assess the extent of progesterone influence on the myometrium. Staircase effects were recorded from the longitudinal fibres of the myometrium in the intact ewe and also in vitro, and the threshold dose of oxytocin required to elicit a contraction was determined. The results, both in vivo and in vitro, demonstrate that the progesterone influence declines before parturition and it is concluded that the extrusion of the foetus is accomplished by an oestrogendominated myometrium. This finding is discussed in relation to the fact that no fall in the progesterone level in blood can be detected before parturition. The oxytocin thresholds determined in vivo suggest that the sensitivity of the myometrium increases with the approach to parturition.
650 $aEndocrinology
650 $aPregnancy
650 $aProgesterone
650 $aReproduction
650 $aSheep
650 $aEndocrinologia
650 $aObstetrícia
650 $aOvino
650 $aReprodução
700 1 $aSCHOFIELD, B. M.
773 $tJournal of Reproduction and Fertility$gv. 1, n. 4, p. 402-409, Nov., 1960.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
