QUANTITATIVE RELATIONSHIPS BETWEEN OESTRADIOL-17β IN THE MILK AND BLOOD OF LACTATING BUFFALOES

Batra, Surinder K.; Arora, Rakesh C.; Bachlaus, N. K.; Pahwa, G. S.; Pandey, Rajesh

doi:10.1677/joe.0.0840205

Cited by 26 publications

(15 citation statements)

References 10 publications

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“…The concentration of oestradiol-17)3 in plasma was estimated by the method of Batra, Arora, Bachlaus, Pahwa and Pandey (1980). Milk (1 ml) was extracted with diethyl ether (5 ml) and evaporated to dryness.…”

Section: Animals and Samplingmentioning

confidence: 99%

Hormonal changes in post-partum blood plasma and milk of buffaloes (Bubalus bubalis)

Pahwa

Pandey

1983

Anim. Sci.

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Post-partum changes in the concentration of progesterone, oestradiol-17/3 and prolactin were measured by radioimmunoassay in the blood plasma and milk of 28 buffaloes. The mean concentration of progesterone in the plasma of normal animals was 0-24 ± 0-04 /u.g/1 on the day of calving and decreased linearly during the post-partum period, until the complete regression of the residual corpus luteum of pregnancy occurred, when the plasma concentration was recorded as 0-05 to 0-08 /xg/\. The concentration at a silent oestrus was 0-17 ± 0-02 /u.g/1. The milk progesterone profile was parallel to that of plasma but the level was 2 to 4 times higher.The mean concentration of oestradiol-17/3 in plasma was 41-0 ± 2-34 ng/1 on the day of calving; it declined significantly by day 1 post partum (P < 0-001) and fluctuated between 8 and 16 ng/1 until oestrus, when the concentration was approximately 25 ng/1. The oestradiol-17/3 concentration in milk was significantly higher than that of plasma on the day of calving. During the first 20 days post partum, a similar concentration of oestradiol-17/3 was maintained in both fluids but thereafter the concentration in milk was 2 to 3 times that of plasma.The mean concentration of prolactin in plasma was 212-6 ± 19-08 /ug/1 on the day of calving and then declined and fluctuated between 70 and 270 ptg/1 during the rest of the period. A minor elevation occurred around oestrus. The prolactin concentration for the first 2 days post partum in milk was significantly higher than that in plasma but during the rest of the period it was similar to that in plasma.The progesterone concentrations were slightly lower in anoestrous animals than in those cycling. The concentration of prolactin was significantly higher in multiparous animals (P < 0-001), whilst the progesterone and oestradiol values were similar in primiparous and multiparous animals.

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Section: Animals and Samplingmentioning

confidence: 99%

Hormonal changes in post-partum blood plasma and milk of buffaloes (Bubalus bubalis)

Pahwa

Pandey

1983

Anim. Sci.

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“…Three buffaloes (1,2 and 3) returned to oestrus on days 23, 20 and 26 respectively after insemination. In contrast to the concentrations in normal buffaloes that conceived (Arora et al, 1979b;Batra et al, 1980), the progesterone was extremely high in these animals and oestradiol level was basal on the day of insemination. Moreover, no LH peak occurred on the day of insemination in these animals.…”

Section: Resultsmentioning

confidence: 61%

“…It is impossible to comment on whether ovulation had occurred in this animal or not. The other two animals (5 and 6) showed concentrations of progesterone, oestradiol-17/J and LH until day 41 after insemination that were similar to those of animals that had conceived (Arora et al, 1979b;Batra et al, 1980;Arora, 1981). These data suggest that pregnancy may have continued until 41 days after insemination, but a sudden decline in progesterone at this time may have been associated with the demise of the embryo.…”

Section: Resultsmentioning

confidence: 73%

“…was measured in duplicate according to a previously described radioimmunoassay (Bachlaus et al, 1979;Batra et al, 1980) without employing chromatography. The exogenous oestradiol-17/?…”

Section: Hormone Assaymentioning

confidence: 99%

“…and LH have been investigated during the oestrous cycle and early pregnancy (Heranjal, Sheth, Moodbidri, Desai and Rao, 1976;Arora, Bachlaus, Prasad and Pandey, 1979b;Bachlaus, Arora, Prasad and Pandey, 1979;Batra, Arora, Bachlaus, Pahwa and Pandey, 1980;Kakar et al, 1980). However, a comprehensive picture of the hormonal profile in 'repeat breeding' buffaloes is lacking.…”

Section: Introductionmentioning

confidence: 99%

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