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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: |
26/06/2023 |
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Autoria: |
BURD, L. I.; TAKAHASHI, K.; WARD, K.; ASCHERMAN, G.; DOWERS, S. |
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Título: |
The relationship of changes in mammary blood flow and plasma progesterone at the time of parturition in the ewe. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
American Journal of Obstetric and Ginecology, v. 132, n. 4, p. 385-391, Oct. 1978. |
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DOI: |
10.1016/0002-9378(78)90772-x |
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Idioma: |
Inglês |
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Conteúdo: |
Previous studies indicate that there is a fall in maternal plasma pregesterone and a marked increase in mammary blood flow (MBF) at the time of parturition in ewes. In this experiment the role of progesterone as a cause of this increase in MBF was investigated. Progesterone was infused (9.9 mcg. per minute) into a branch of the mammary artery in five sheep during the induction of premature labor by fetal dexamethasone infusion (1 mg. per 24 hours) to prevent the normal fall in concentration of local mammary artery progesterone. Five ewes used as controls received a mammary artery infusion of cholesterol (9.9 mcg. per minute). In the cholesterol-infused group MBF increased significantly from baseline values after 13 mais ou menos 4 hours (mean mais ou menos standard error) to a peak flow of 235 mais ou menos 9 ml. per minute. In the group receiving the progesterone the increase in MBF was delayed to 35 mais ou menos 7 hours, reaching only 161 mais ou menos 22 ml. per minute. These results were significantly different from control group results (p<0,01). This study suggests that the fall in maternal plasma progesterone which occurs at the time of parturition may play a role in the increase in MBF that occurs prior to the onset of labor, delivery, and lactogenesis. (AM. J. OBSTET. GYNECOL. 132: 385, 1978). |
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Palavras-Chave: |
Blood supply; Regional Blood Flow. |
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Thesagro: |
Circulação Sangüínea; Endocrinologia; Glândula Mamaria; Ovino; Prenhez; Progesterona; Reprodução. |
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Thesaurus Nal: |
Mammary glands; Pharmacology; Pregnancy; Progesterone; Reproduction; Sheep. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02368naa a2200361 a 4500
001 1521864
005 2023-06-26
008 1978 bl uuuu u00u1 u #d
024 7 $a10.1016/0002-9378(78)90772-x$2DOI
100 1 $aBURD, L. I.
245 $aThe relationship of changes in mammary blood flow and plasma progesterone at the time of parturition in the ewe.$h[electronic resource]
260 $c1978
520 $aPrevious studies indicate that there is a fall in maternal plasma pregesterone and a marked increase in mammary blood flow (MBF) at the time of parturition in ewes. In this experiment the role of progesterone as a cause of this increase in MBF was investigated. Progesterone was infused (9.9 mcg. per minute) into a branch of the mammary artery in five sheep during the induction of premature labor by fetal dexamethasone infusion (1 mg. per 24 hours) to prevent the normal fall in concentration of local mammary artery progesterone. Five ewes used as controls received a mammary artery infusion of cholesterol (9.9 mcg. per minute). In the cholesterol-infused group MBF increased significantly from baseline values after 13 mais ou menos 4 hours (mean mais ou menos standard error) to a peak flow of 235 mais ou menos 9 ml. per minute. In the group receiving the progesterone the increase in MBF was delayed to 35 mais ou menos 7 hours, reaching only 161 mais ou menos 22 ml. per minute. These results were significantly different from control group results (p<0,01). This study suggests that the fall in maternal plasma progesterone which occurs at the time of parturition may play a role in the increase in MBF that occurs prior to the onset of labor, delivery, and lactogenesis. (AM. J. OBSTET. GYNECOL. 132: 385, 1978).
650 $aMammary glands
650 $aPharmacology
650 $aPregnancy
650 $aProgesterone
650 $aReproduction
650 $aSheep
650 $aCirculação Sangüínea
650 $aEndocrinologia
650 $aGlândula Mamaria
650 $aOvino
650 $aPrenhez
650 $aProgesterona
650 $aReprodução
653 $aBlood supply
653 $aRegional Blood Flow
700 1 $aTAKAHASHI, K.
700 1 $aWARD, K.
700 1 $aASCHERMAN, G.
700 1 $aDOWERS, S.
773 $tAmerican Journal of Obstetric and Ginecology$gv. 132, n. 4, p. 385-391, Oct. 1978.
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