...Victoria S. Farrar ABSTRACT Gonadal sex steroid hormones are well-studied modulators of reproductive physiology and behavior. Recent behavioral endocrinology research has focused on how the brain dynamically responds to – and may even produce – sex steroids, but the gonadal tissues that primarily...

... g −1 body mass) or vehicle in males and females during the spring mating season and autumn pre-hibernation period. Because elevated glucocorticoids can influence sex steroids, we also examined androgen and estradiol responses to ACTH. ACTH treatment increased glucocorticoids in both sexes...

... smaller ornaments that had less UV and orange-to-red wavelength reflectance relative to medium wavelength reflectance. The sex steroid hormones testosterone and estradiol were correlated to corticosterone levels, but did not appear to underlie the effect on ornament expression; of the steroids measured...

... intracellular but not surface receptors for testosterone and estradiol. Steroids 67 , 647 -654. Bilbo, S. D. and Nelson, R. J. ( 2001 ). Sex steroid hormones enhance immune function in male and female Siberian hamsters. Am. J. Physiol. 280 , R207 -R213. Burley, R. W., Back, J. F., Wellington, J...