Abstract
THE photoperiodic response giving increased wool-growth in sheep1 having been demonstrated, we are now endeavouring to trace the mode and function of this response. One section of a series of experiments designed to cover this aspect involved the use of hormone-replacement therapy. This required the acceptance as a working hypothesis that the pituitary gland is stimulated by the photoperiodic treatment so as to increase the output of the various hormones known to be associated with it, resulting finally in an increased rate of wool-growth. The availability of hormones restricted the number which could be used to three.
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References
Hart, D. S., Nature, 171, 133 (1953).
Maqsood, M., Nature, 166, 647 (1950).
Coop, I. E., J. Agric. Sci., 43, 456 (1953).
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HART, D. Augmentation of Wool-growth by I-Thyroxine and Tri-iodo-thyronine in Sheep. Nature 174, 1018–1019 (1954). https://doi.org/10.1038/1741018b0
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DOI: https://doi.org/10.1038/1741018b0
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