Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.physbeh.2011.07.009
Title: Seasonal variation of salivary testosterone in men, normally cycling women, and women using hormonal contraceptives
Authors: Stanton, S.J.
Mullette-Gillman, O.A. 
Huettel, S.A.
Keywords: Circannual
Gender
Hormonal contraceptive
Seasonal variation
Sex
Steroid
Testosterone
Issue Date: 24-Oct-2011
Source: Stanton, S.J., Mullette-Gillman, O.A., Huettel, S.A. (2011-10-24). Seasonal variation of salivary testosterone in men, normally cycling women, and women using hormonal contraceptives. Physiology and Behavior 104 (5) : 804-808. ScholarBank@NUS Repository. https://doi.org/10.1016/j.physbeh.2011.07.009
Abstract: Humans' endogenous testosterone concentrations vary over a number of temporal scales, with little known about variation longer than monthly cycles. Past studies of seasonal or circannual variation have principally used male participants and have produced inconsistent results. Thus, little is known about how testosterone concentrations fluctuate throughout the year, whether such variation differs between men and women, and whether there are influences of hormonal contraceptive use. The present study collected saliva samples from a large sample (N. = 718) of men and women, each collected at one time point within a relatively uniform distribution over a full calendar year. Both men and normally-cycling women displayed seasonal variation in salivary testosterone concentrations, such that testosterone concentrations are maximal in the fall and minimal in the summer. Notably, normally-cycling women had testosterone concentrations that were over 100% greater at their maximum in fall compared to their minimum in summer. Women using hormonal contraceptives not only had consistently lower endogenous testosterone concentrations, but also showed a flatter seasonal testosterone profile. The implications for studies of psychology and human behavioral endocrinology are discussed. © 2011 Elsevier Inc.
Source Title: Physiology and Behavior
URI: http://scholarbank.nus.edu.sg/handle/10635/49900
ISSN: 00319384
DOI: 10.1016/j.physbeh.2011.07.009
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