Abstract
IN man, several studies1,2 have demonstrated diurnal variation, with a morning peak, in plasma testosterone—the most potent naturally occurring androgen. The origin of this variation is not known.
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EVANS, J., MACLEAN, A., ISMAIL, A. et al. Concentrations of Plasma Testosterone in Normal Men during Sleep. Nature 229, 261–262 (1971). https://doi.org/10.1038/229261a0
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DOI: https://doi.org/10.1038/229261a0
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