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Comparison of oestrone sulphate concentrations in mammary secretions during lactogenesis and lactation in dairy ruminants

Published online by Cambridge University Press:  01 June 2009

Maureen Hamon ,
Ivan R. Fleet  and
R. Brian Heap
Maureen Hamon
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Babraham, Cambridge CB2 4AT, UK
Ivan R. Fleet
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Babraham, Cambridge CB2 4AT, UK
R. Brian Heap
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Babraham, Cambridge CB2 4AT, UK
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Extract

Oestrone sulphate is quantitatively a major oestrogen in pregnant goats rising gradually in concentration in milk and plasma as placental function develops (Heap et al. 1984). We report here that its concentration in mammary secretions increases sharply at the time of parturition. The results support the idea that oestrone sulphate in mammary secretions could be used as a predictor of the onset of parturition in dairy animals.

Type
Short Communication
Information
Journal of Dairy Research , Volume 57 , Issue 3 , August 1990 , pp. 419 - 422
Copyright
Copyright © Proprietors of Journal of Dairy Research 1990

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References

REFERENCES

Challis, J. R. G. 1971 Sharp increase in free circulating oestrogens immediately before parturition in sheep. Nature 229 208CrossRefGoogle ScholarPubMed
Foulkes, J. A. & Heap, R. B. 1987 Managing fertility in dairy cattle. Span 30 42–44Google Scholar
Heap, R. B., Fleet, I. R., Hamon, M., Booth, J. M. & Chaplin, V. M. 1986 Hormone changes in milk at the onset of lactogenesis and parturition in Friesland sheep. Journal of Agricultural Sciences 106 265–269Google Scholar
Heap, R. B. & Hamon, M. 1979 Oestrone sulphate in milk as an indicator of a viable conceptus in cows. British Veterinary Journal 135 355–363CrossRefGoogle ScholarPubMed
Heap, R. B., Hamon, M. & Fleet, I. R. 1984 Transport of oestrone sulphate by the mammary gland in the goat. Journal of Endocrinology 101 221–230CrossRefGoogle ScholarPubMed
Peaker, M. & Linzell, J. L. 1975 Citrate in milk: a harbinger of lactogenesis. Nature 253 464CrossRefGoogle ScholarPubMed
Robertson, H. A. & Smeaton, T. C. 1973 The concentration of unconjugated oestrone, oestradiol-17α and oestradiol-17β in the maternal plasma of the pregnant ewe in relation to the initiation of parturition and lactation. Journal of Reproduction and Fertility 35 461–468CrossRefGoogle Scholar
Thorburn, G. D., Nicol, D. H., Bassett, J. M., Shutt, D. A. & Cox, R. I. 1972 Parturition in the goat and sheep: changes in corticosteroids, progesterone, oestrogens and prostaglandin F. Journal of Reproduction and Fertility, Supplement 16 61–84Google ScholarPubMed
Tsang, C. P. W. 1978 Plasma levels of estrone sulfate, free estrogens and progesterone in the pregnant ewe throughout gestation. Theriogenology 10 97–110CrossRefGoogle Scholar