Oestrogen concentrations in systemic plasma of pregnant pygmy goats

Dhindsa, Dharam S.; Metcalfe, Jessica; Resko, John A.

doi:10.1530/jrf.0.0620099

Cited by 17 publications

(9 citation statements)

References 5 publications

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“…The present finding showed higher level (over all 11.59% higher) of estrogen in twin pregnancy as compared to singlet on all test days although it was not significant. Dhindsa et al (1981) also reported significantly higher estradiol in goats with multiple fetuses as compared to singlet fetus. Moreover Manalu et al (1996) reported two times higher concentration of estrogen in twin bearing goats as compared to singlet bearing goats.…”

Section: Plasma Hormonesmentioning

confidence: 84%

Blood biochemical and hormonal profiles vis-a-vis production performance of single and twin kid bearing Surti goats (Capra hircus)

Gamit

Rao

Patel

et al. 2018

IJAR

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Study was undertaken to investigate the effect of single and twin kidding on blood bio-chemical, hormonal profiles and production performance of 14 goats. The animals were divided into group1 (single kid, n=7) and group 2 (twin kids, n= 7). The blood samples were collected on 0, 7, 15, 30, 45 and 60 day of parturition for analysis of blood profiles. Milk yield and fat% were also recorded on different test days. Serum glucose, albumin, BUN and cholesterol was higher in twin bearing dam; however, it was not significantly (P<0.05) different. Overall total protein and NEFA was higher in singlet bearing goats on 0 and 45 days of parturition. Cortisol was significantly (P<0.05) higher in singlet bearing goats initially (7d) during kidding, however overall cortisol level was higher in twin bearing dams, indicating fast recovery of stress in singlet bearing goats. Level of estrogen was also higher in twin bearing goats. Milk yield was significantly higher in twin bearing goats. It was therefore inferred that kidding pattern had a marked influence on blood profiles and production performance in Surti goats.

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Section: Plasma Hormonesmentioning

confidence: 84%

Blood biochemical and hormonal profiles vis-a-vis production performance of single and twin kid bearing Surti goats (Capra hircus)

Gamit

Rao

Patel

et al. 2018

IJAR

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“…In normally cycling Shiba goats, the concentrations of E 2 -17β at estrus [14, 15, 17] were reported to be approximately 20–30 pg/ml. In pregnant goats approaching parturition, it was reported that the concentration of E 2 -17β in maternal circulation reaches maximally 10-fold as much as that at estrus, while estrone and estradiol-17α become 10- to 15-fold higher than E 2 -17β [28,29,30,31,32,33,34]. Studies in sheep [35], humans [36, 37] and rats [36] suggested that estrone and estradiol-17α have about 20–60% binding affinities to estrogen receptors relative to E 2 -17β.…”

Section: Discussionmentioning

confidence: 99%

Exposure to Estrogen Mimicking the Level of Late Pregnancy Suppresses Estrus Subsequently Induced by Estrogen at the Level of the Follicular Phase in Ovariectomized Shiba Goats

Nagai

Endo

Tanaka

et al. 2013

Journal of Reproduction and Development

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A high-estrogen environment during late pregnancy is suspected to cause postpartum silent ovulation, and progesterone (P4) is suggested to recover estrus. However, few attempts have been undertaken to elucidate the influence of these steroids on estrus by analyzing hormonal profiles. We investigated estrus and luteinizing hormone (LH) surges in ovariectomized goats (n=6) assigned to three treatments in a cross-over design. In groups 1 and 2, 200 µg/kg body weight/day estradiol benzoate (Dose-200 E2B) was administered for 14 days concurrent with P4 for 11 days, while in the control, saline solution and P4 were administered likewise. Ten days after the final administration of Dose-200 E2B, group 2 was treated with P4 for 8 days, and all groups were treated with 2 µg/kg body weight E2B (Dose-2 E2B) 20 days after the final administration of Dose-200 E2B (or saline solution). The proportion of cases expressing estrus after the administration of Dose-2 E2B was smaller (P<0.01) in group 1 than in the control (1/6, 3/6 and 6/6; groups 1 and 2 and the control, respectively). The proportions of cases generating LH surges did not differ (P>0.1) among the groups (5/6, 5/6 and 6/6; groups 1 and 2 and the control, respectively), but the peak concentrations in groups 1 and 2 (26.2 ± 14.7 and 11.3 ± 6.7 ng/ml) were lower (P<0.01) than those in the control (67.8 ± 19.4 ng/ml). These results demonstrated that elevation of plasma estrogen mimicking late pregnancy inhibits the subsequent estrus induced by estrogen simulating the follicular phase.

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“…They also demonstrated the ability of a hormone-based test to detect non-pregnancy where it might otherwise have gone undetected. Dhindsa, Metcalfe & Resko (1981) have examined oestrogen levels by RIA in goats during pregnancy but the specific steroids were oestrone, oestradiol-17a and oestradiol-17ß and they were examined in circulating plasma as opposed to milk. They found that levels of oestrogens were significantly higher in the plasma of pregnant animals carrying multiple fetuses than in plasma from animals with a single fetus.…”

Section: Discussionmentioning

confidence: 99%

Field evaluation of a pregnancy immunoassay for the detection of oestrone sulphate in goats

McArthur¹,

Geary²

1986

Journal of Endocrinology

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The concentration of oestrone sulphate in whey obtained from 66 pregnant dairy goats was measured by direct radioimmunoassay. The mean time at which pregnancy was first detected was day 41 of gestation. Levels remained low (37 pmol/l-0.96 nmol/l, mean = 167 pmol/l) until week 5 of gestation when they rose rapidly. The test had an accuracy of 95.6%, was able to distinguish true from pseudopregnancy, and suggested that pregnancy in females carrying multiple fetuses could be detected earlier, possibly as a result of the fetal-placental origin of oestrone sulphate.

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Oestrogen concentrations in systemic plasma of pregnant pygmy goats

Cited by 17 publications

References 5 publications

Blood biochemical and hormonal profiles vis-a-vis production performance of single and twin kid bearing Surti goats (Capra hircus)

Blood biochemical and hormonal profiles vis-a-vis production performance of single and twin kid bearing Surti goats (Capra hircus)

Exposure to Estrogen Mimicking the Level of Late Pregnancy Suppresses Estrus Subsequently Induced by Estrogen at the Level of the Follicular Phase in Ovariectomized Shiba Goats

Field evaluation of a pregnancy immunoassay for the detection of oestrone sulphate in goats

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