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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: |
05/07/2023 |
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Autoria: |
WENTZEL, D.; MORGENTHAL, J. C.; VAN NIEKERK, C. H. |
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Título: |
The habitually aborting angora doe. V. Plasma oestrogen concentration in normal and aborter does with special reference to the effect of an energy deficiency. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Agroanimalia, v. 7, p. 35-40, 1975. |
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Idioma: |
Inglês |
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Conteúdo: |
Plasma oestrogen concentration in normal and aborter does which received a submaintenance energy diet during the last third of pregnancy was determined by competitive protein binding assay (CPB). Circulating oestrogens in normal does remained at a relatively low level of 500 pg/m1 plasma during the first 90 days of gestation. Following the nutritional change the mean plasma oestrogen concentration abruptly increased to 1951 pg/ml and which was maintained at a similar level up to parturition. In all aborters and does whose kids had died perinatally the increase in circulating oestrogens, due to the stress of subnutrition, was significantly higher than in normal does. It is concluded that abortions following nutritional stress are mediated by an elevated oestrogen level which leads to expulsion of the conceptus. Oestrogen concentration in foetal plasma increased progressively from 160 pg/ml at the 72nd day to 320 pg/ml at the 140th day of gestation. The results suggest no direct relationship between maternal and foetal plasma oestrogen levels |
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Thesagro: |
Aborto; Caprino; Reprodução. |
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Thesaurus Nal: |
Abortion (animals); Goats; Nutrient deficiencies; Reproduction. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01763naa a2200229 a 4500
001 1519608
005 2023-07-05
008 1975 bl uuuu u00u1 u #d
100 1 $aWENTZEL, D.
245 $aThe habitually aborting angora doe. V. Plasma oestrogen concentration in normal and aborter does with special reference to the effect of an energy deficiency.$h[electronic resource]
260 $c1975
520 $aPlasma oestrogen concentration in normal and aborter does which received a submaintenance energy diet during the last third of pregnancy was determined by competitive protein binding assay (CPB). Circulating oestrogens in normal does remained at a relatively low level of 500 pg/m1 plasma during the first 90 days of gestation. Following the nutritional change the mean plasma oestrogen concentration abruptly increased to 1951 pg/ml and which was maintained at a similar level up to parturition. In all aborters and does whose kids had died perinatally the increase in circulating oestrogens, due to the stress of subnutrition, was significantly higher than in normal does. It is concluded that abortions following nutritional stress are mediated by an elevated oestrogen level which leads to expulsion of the conceptus. Oestrogen concentration in foetal plasma increased progressively from 160 pg/ml at the 72nd day to 320 pg/ml at the 140th day of gestation. The results suggest no direct relationship between maternal and foetal plasma oestrogen levels
650 $aAbortion (animals)
650 $aGoats
650 $aNutrient deficiencies
650 $aReproduction
650 $aAborto
650 $aCaprino
650 $aReprodução
700 1 $aMORGENTHAL, J. C.
700 1 $aVAN NIEKERK, C. H.
773 $tAgroanimalia$gv. 7, p. 35-40, 1975.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
