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Total Thyroxine and Free Thyroxine Index in Plasma of Dairy Cows in Relation To Strength of Heat

Tyroksin og fri tyroksin indeks i kuplasma i relasjon til brunststyrke. Total tyroksin (TT4) og fri tyroksin indeks (FT4I) ble målt i perifert plasma fra kuer. Blodprøver ble tatt fra 66 kuer som viste utpregede psykiske brunsttegn og fra 56 kuer som hadde meget svak eller stille brunst. Blodprøvene ble tatt samtidig med at kuene ble inseminert. Det ble ikke funnet noen forskjell hverken i TT4 eller i FT4I mellom de to grupper av dyr.

Acta Veterinaria Scandinavica volume 21, pages 108–112 (1980)Cite this article

Abstract

Total thyroxine (TT4) and free thyroxine index (FT4I) were measured in peripheral plasma of cows. The samples were collected at the time of insemination from 66 cows showing pronounced signs of the heat and from 56 cows showing weak or silent heat. Neither TT4 or FT4I in plasma differed significantly between the two categories of oestrous cows.

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Authors and Affiliations

  1. Department of Reproductive Physiology and Pathology, Veterinary College of Norway, Oslo, Norway

    Ø. Andresen, J. Amrud, L. E. Grøholt, G. Heiland, K. A. Schie & G. A. Sylliås

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  1. Ø. Andresen
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  2. J. Amrud
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  3. L. E. Grøholt
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  4. G. Heiland
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  5. K. A. Schie
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  6. G. A. Sylliås
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The study was financially supported by the Agricultural Research Council of Norway.

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Andresen, Ø., Amrud, J., Grøholt, L.E. et al. Total Thyroxine and Free Thyroxine Index in Plasma of Dairy Cows in Relation To Strength of Heat. Acta Vet Scand 21, 108–112 (1980). https://doi.org/10.1186/BF03546905

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Acta Veterinaria Scandinavica

ISSN: 1751-0147