Progesterone Concentration in the Peripheral Plasma of Pregnant Goats

Irving, Greg; Da, Jones; Knifton, A

doi:10.1677/joe.0.0530447

Cited by 38 publications

(9 citation statements)

References 20 publications

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“…The changes in maternal peripheral plasma concentrations of progesterone and oestrogens in the goats that gave birth normally at term in the present study resemble those observed by previous workers (Challis & Linzell, 1971;Irving, Jones & Knifton, 1972;Thorburn & Schneider, 1972 (Currie & Thorburn, 1974). This period encompasses the gestation lengths of the operated goats in the present study and it seems possible that the corpus luteum of pregnancy has a finite, albeit variable, lifespan, which, in the absence of a more positive mechanism, would eventually terminate pregnancy.…”

Section: Resultssupporting

confidence: 88%

Effect of fetal hypophysectomy on the initiation of parturition in the goat

Rawlings¹,

Ward²

1978

Reproduction

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Summary. Fetal hypophysectomy performed between 97 and 130 days of gestation caused a significant (P < 0.005) prolongation of pregnancy in 5 goats in which every fetus was treated. Three of these goats gave birth spontaneously. Sham surgery or hypophysectomy of one fetus of twins had no effect on gestation length. Hypophysectomized kids, delivered after prolonged pregnancy, were significantly heavier than normal term kids (P < 0.005) and had lighter adrenals (P < 0.025). Measurements of maternal peripheral plasma concentrations of progesterone and total unconjugated oestrogens showed that the changes in goats carrying hypophysectomized fetuses were similar to those of normal pregnancy except that the prepartum oestrogen peak was absent, whether or not parturition occurred spontaneously.

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Section: Resultssupporting

confidence: 88%

Effect of fetal hypophysectomy on the initiation of parturition in the goat

Rawlings¹,

Ward²

1978

Reproduction

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“…In pregnant animals, mean progsterone concentrations were in the range of those found by Thorburn & Schneider (1972) and Irving et al (1972) but no elevation of progesterone concen¬ trations with the stage of gestation was noticed. As reported for the ewe with the bovine PSPB assay (Ruder et al, 1988), Day 24 was the first day at which mean PSPB concentrations were different in pregnant (Group 3) and non-pregnant animals from Group 1.…”

Section: Discussionmentioning

confidence: 57%

Pregnancy-specific protein B and progesterone concentrations in French Alpine goats throughout gestation

Humblot¹,

Montigny²,

Jeanguyot³

et al. 1990

Reproduction

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Summary. The 34 French Alpine dairy goats originated from a single flock and were artificially inseminated 44 h after synchronization of oestrus. They were bled daily at the jugular vein from 15 to 27 days after AI. An early pregnancy diagnosis by RIA of progesterone concentration was performed 21 days after AI. In pregnant goats (\ m=ge\1\ m=. \ 5ng progesterone/ml) daily sampling was extended until 30 days after AI and, from those, 9 were bled every 2 weeks until the end of pregnancy and at 50 and 63 days post partum. Pregnancy-specific protein B (PSPB) was also assayed.The kidding rate was 67\m=.\6% (23/34). PSPB concentrations (ng/ml) in pregnant goats were significantly different from those of non-pregnant goats at 24 days after AI (0\m=.\82 \m=+-\0\m=.\18vs 1\m=.\78 \ m=+-\ 0\m=.\19; mean \m=+-\ s.e.m.) and rose to 40 ng/ml at the end of pregnancy. From Day 25 and throughout gestation, females with 2 fetuses had higher PSPB concentrations than did those with a single fetus (P < 0\m=.\05). In the 2 goats exhibiting late embryonic mortality according to progesterone concentrations, one had a PSPB profile very similar to those of pregnant goats until 30 days while the other did not show any elevation of PSPB concentration. It is concluded that PSPB profiles in goats are similar to those found in cows throughout pregnancy and that PSPB RIA may be useful for pregnancy diagnosis or diagnosis of late embryonic mortality.

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“…A gestação concordaram com Irving et al (1972), Jain et al (1980), Currie et al (1988), Kornalijnslijper et al (1997), Romero et al (1998), Engeland et al (1999), Sousa et al (1999) e Prina (2007 que relataram diminuição gradativa até próximo ao momento do parto, com queda acentuada no dia do parto e diferiu dos resultados de Manalu et al (1996) onde os valores antes do parto e no dia do parto mantiveram-se quase que inalterados. Lye et al (1996) relataram que em muitas espécies, o início do parto está associado com uma interrupção no estado de dominância da progesterona para uma maior influência do estradiol.…”

Section: Resultsunclassified

Leucograma e metabolismo oxidativo de neutrófilos em cabras da raça Saanen nos períodos de gestação, parto e pós-parto

et al. 2013

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RESUMO.-O presente estudo teve como objetivo a avaliação do leucograma e do metabolismo oxidativo de neutrófilos em fêmeas caprinas da raça Saanen, nos períodos The purpose of this study was to evaluate the leukocyte count and the oxidative metabolism of neutrophil in Saanen goats during periods of pregnancy, parturition and postpartum. Were used 20 Saanen goats, clinically healthy and serologically negative for caprine arthritis encephalitis virus (CAEV). Blood samples were collected by jugular venipuncture 49 (M1), 42 (M2), 35 (M3), 28 (M4), 21 (M5), 14 (M6), seven (M7), three (M8) days before the parturition, on the day of birth (M9), three (M10) and seven (M11) days postpartum, for the leukocyte count, and serum for cortisol, estradiol and progesterone determination. From 28 days (M4) before parturition until seven days postpartum (M11) blood samples were collected for evaluation of oxidative metabolism of neutrophils by the nitroblue tetrazolium reduction test (NBT). The results showed that at parturition day there were an increase in cortisol and estradiol levels and a decrease in progesterone serum, neutrophilic leukocytosis and left shift slight, decrease of lymphocytes, increase in the neutrophil: lymphocyte, eosinopenia, monocytosis and basophilia. There was a neutrophilic leukocytosis and an increase in the neutrophil: lymphocyte on the seventh day postpartum. There were not significant alterations in oxidative metabolism of neutrophils during pregnancy, parturition and postpartum. It was concluded that parturition causes an elevation in cortisol and estradiol levels and a decrease in progesterone serum determining a neutrophilic leukocytosis and left shift slight, with a reduction of lymphocytes, increase in the neutrophil:lymphocyte, eosinopenia, monocytosis and basophilia. Neutrophilic leukocytosis, increase in the neutrophil: lymphocyte and fibrinogen are detected on the seventh day postpartum. Pregnancy, parturition and the postpartum do not change the oxidative metabolism of neutrophils evaluated by NBT reduction test. de gestação, parto e pós-parto. Amostras de sangue foram colhidas de 20 fêmeas nulíparas da raça Saanen, clinicamente sadias por venipunção jugular aos 49 (M1), 42 (M2),

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Progesterone Concentration in the Peripheral Plasma of Pregnant Goats

Cited by 38 publications

References 20 publications

Effect of fetal hypophysectomy on the initiation of parturition in the goat

Effect of fetal hypophysectomy on the initiation of parturition in the goat

Pregnancy-specific protein B and progesterone concentrations in French Alpine goats throughout gestation

Leucograma e metabolismo oxidativo de neutrófilos em cabras da raça Saanen nos períodos de gestação, parto e pós-parto

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