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Andresen Ø. Amrud J. Grøholt L. E. Heiland G. Schie K. A. Sylliås G. A. 《Acta veterinaria Scandinavica》1980,21(1):108-112
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. 相似文献
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