Relative Concentration of Extrogen and Progestrone in Milk and Blood, and Excretion of Estrogene in Urine

Erb, R.E.; Chew, Boon P.; Keller, H.

doi:10.2527/jas1977.453617x

Cited by 50 publications

(29 citation statements)

References 18 publications

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“…Our data show a significant correlation between concentrations of E2 in colostrum and those in plasma, especially during parturition. This was also found to be the case in cows [58][59][60]. Österlundh et al [14] reported lower concentrations of E2 in colostrum/milk after parturition (< 100 pg·mL -1 vs. > 500 pg·mL -1 ) than in the present study despite similar concentrations in plasma.…”

Section: Comparison Of Hormone Concentrations In Plasma and Other Fluidscontrasting

confidence: 54%

Hormones, IgG and lactose changes around parturition in plasma, and colostrum or saliva of multiparous sows

et al. 2004

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-Blood, colostrum and saliva samples were serially taken from 6 multiparous sows from day 109 of gestation until day 3 postpartum. Plasma was assayed for oestradiol-17β (E2), progesterone (P4), prolactin (PRL), cortisol, immunoglobulin G (IgG) and lactose. Colostrum was assayed for E2, P4, IgG and lactose. Lactoserum, obtained after ultra centrifugation of colostrum, was assayed for PRL. Saliva was assayed for cortisol. Time-related variations in hormone, IgG and lactose concentrations measured in plasma were parallel to those measured in colostrum, lactoserum or saliva. However, the concentrations were higher in colostrum or lactoserum and lower in saliva than in plasma. Ratios of concentrations of cortisol in saliva and PRL in lactoserum over those in plasma did not vary with time and averaged 0.2 and 1.6, respectively. Conversely, the ratios of concentrations of E2 and P4 in colostrum over those in plasma varied with time (P < 0.05) but were quite constant before the end of parturition, averaging 2.7 and 3.6, respectively. The ratios of concentrations of IgG and lactose in colostrum over those in plasma also varied with time (P < 0.05). The concentrations of hormones in plasma on the one hand and in colostrum, lactoserum or saliva on the other hand were significantly correlated but correlations varied with time (PRL across periods: r = 0.31; cortisol across periods: r = 0.60; E2 during parturition: r = 0.83; P4 before parturition: r = 0.82; P4 during parturition: r = 0.67). The present results indicate that around parturition, assays of hormones in colostrum or saliva can be used to study the hormonal status of sows. Furthermore, variations in colostrum and plasma concentrations of IgG and lactose are good indicators of the transition from colostrum to milk synthesis. sow / parturition / steroid / prolactin / lactose / immunoglobulins

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Section: Comparison Of Hormone Concentrations In Plasma and Other Fluidscontrasting

confidence: 54%

Hormones, IgG and lactose changes around parturition in plasma, and colostrum or saliva of multiparous sows

et al. 2004

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“…Higher yield of capsicum from urine application plot might be due to greater availability of different essential nutrient elements and hormones from cattle urine at various growth stages of capsicum. These results are inconformity with Hormones present in urine helped to produce higher yield in alfalfa (Erb et al, 1977). Panchagavya spray influenced significantly on fruit yield per plant.…”

Section: Yield Parametersmentioning

confidence: 43%

Growth and Yield of Capsicum (Capsicum annuum L. Var. Grossum) as Influenced by Organic Liquid Formulations

Boraiah¹,

Devakumar²,

Palanna³

2017

Int.J.Curr.Microbiol.App.Sci

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“…The evaluation of progesterone levels in blood and milk, 20-25 days after insemination, has been used for the diagnosis of pregnancy (Robertson & Sarda, 1971; Gadsby, Heap, Henville & Laing, 1974; Pope, Majzlik, Ball & Leaver, 1976;Bulman & Lamming, 1976;Hoffmann, Günzler, Hamburger & Schmidt, 1976; Heap, Holdsworth, Gadsby, Laing & Walters, 1976;Pennington, Spahr & Lodge, 1976a;Holness, Ellison & Wilkins, 1977;Erb, Chew & Keller, 1977), but determinations in milk offer considerable advantages because milk is easier to collect than blood. Various methods have been described for the assay of progesterone in milk, either directly in small amounts of milk (Gadsby et al, 1974;Bulman & Lamming, 1976;Heap et ai, 1976;Dobson & Fitzpatrick, 1976;Allen, Redshaw & Holdsworth, 1980) or after extraction with petroleum ether (Schiavo, Matuszczak, Oltanacu & Foote, 1975;Pennington et ai, 1976a) or petroleum ether and methanol (Hoffmann et al, 1976), but the existence of non-specific interference, the high solubility of progesterone in fat and the effect of variations in fat content on the amount of progesterone determined in different milk samples (Pope et al, 1976) give low precision and accuracy of the assays (Schiavo et al, 1975;Heap et al, 1976).…”

Section: Introductionmentioning

confidence: 99%

Pregnancy diagnosis in cattle by a rapid and highly reliable method for progesterone determination in milk

Inaudi¹,

Bacigalupo²,

Monittola³

et al. 1982

Reproduction

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Summary. A highly reliable technique for the determination of progesterone in milk has been developed, and its application to pregnancy diagnosis in cows is reported. The method is characterized by an activated charcoal treatment of the samples, extraction of the absorbed progesterone by an organic solvent, followed by RIA. The application of the method to pregnancy diagnosis, 21\p=n-\23 days after artificial insemination, shows that 5 ng/ml is the most useful value to discriminate between pregnant and non-pregnant animals, with greatest precision on the 21st day, in that 93\m=.\5%of pregnant and 100% of non-pregnant animals were correctly diagnosed.

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Relative Concentration of Extrogen and Progestrone in Milk and Blood, and Excretion of Estrogene in Urine

Cited by 50 publications

References 18 publications

Hormones, IgG and lactose changes around parturition in plasma, and colostrum or saliva of multiparous sows

Hormones, IgG and lactose changes around parturition in plasma, and colostrum or saliva of multiparous sows

Growth and Yield of Capsicum (Capsicum annuum L. Var. Grossum) as Influenced by Organic Liquid Formulations

Pregnancy diagnosis in cattle by a rapid and highly reliable method for progesterone determination in milk

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