Seasonal variation in serum concentrations of reproductive hormones and urinary excretion of 6-sulfatoxymelatonin in men living north and south of the Arctic Circle: a longitudinal study.

• Published in: Clinical Endocrinology
• Main Authors: Ruhayel, Yasir, Malm, Gunilla, Haugen, Trine B, Henrichsen, Trine, Bjorsvik, Cathrine, Grotmol, Tom, Sæther, Thomas, Malm, Johan, Figenschau, Yngve, Rylander, Lars, Levine, Richard J, Giwercman, Aleksander
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley-Blackwell 2007
• Subjects: Endocrinology and Diabetes; Arctic; Tromso
• Online Access: https://lup.lub.lu.se/record/540020; https://doi.org/10.1111/j.1365-2265.2007.02843.x

bjective Seasonal variation in photoperiod or temperature may influence human reproductive biology. The present study evaluated whether seasonal changes occurred in the levels of reproductive hormones and the major melatonin metabolite, 6-sulfatoxymelatonin (aMT6s), in populations exposed to extreme...