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JULIA LOBOTSKY, HANS I. WYSS, EUGENE J. SEGRE, CHARLES W. LLOYD, Plasma Testosterone in the Normal Woman, The Journal of Clinical Endocrinology & Metabolism, Volume 24, Issue 12, 1 December 1964, Pages 1261–1265, https://doi.org/10.1210/jcem-24-12-1261
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Plasma testosterone concentration was determined in 57 samples from 9 normal women in 17 ovulatory menstrual cycles, using the double isotope method of Riondel et al. (3). The mean concentration was 0.054 μg/100 ml ±0.015 (SD) without subtraction of the water blank, which had a mean of 0.020 μg/100 ml ±0.005 (SD). The range of plasma testosterone in normal women is narrow. Values greater than 1 standard deviation above the mean were observed only during the ovulatory and luteal phases of the cycle. There was no correlation between plasma testosterone levels and urinary 17-ketosteroid excretion.