CIRCADIAN AND CIRCANNUAL RHYTHMS IN PLASMA HORMONES AND OTHER VARIABLES OF FIVE HEALTHY YOUNG HUMAN MALES
- 1 July 1978
- journal article
- research article
- Published by Oxford University Press (OUP) in Acta Endocrinologica
- Vol. 88 (3) , 417-427
- https://doi.org/10.1530/acta.0.0880417
Abstract
Every other month (plasma) and every month (urine) circadian rhythms were documented for 14 mo. Annual changes were validated in the 24 h mean of: plasma FSH [follicle stimulating hormone], annual crest time, Feb.; LH [luteinizing hormone], March; thyroxine, Sept.; cortisol, Feb.; renin activity, April; testosterone, Oct.; urinary 17-hydroxycorticosteroids, March; aldosterone, March; K, May; and sexual activity, Sept. [self-recorded daily]. Plasma prolactin did not show an annual variation. In addition, annual changes in the circadian acrophase (crest time location in the 24-h scale) occurred for some of the documented variables: plasma thyroxine, cortisol, renin activity, testosterone, urinary aldosterone and K.This publication has 8 references indexed in Scilit:
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