Scent attractiveness of sweat samples collected from male students before and during theoretical exams was assessed by female students. Five-rank scale was used for subjective assessment of the scent samples in term unpleasant/pleasant. Scent attractiveness depended on physiological conditions of both recipients and donors. Male students with low basal concentration of salivary cortisol smelt better than students with high level of cortisol. High level of salivary testosterone also was associated with low scent attractiveness of the male students, but only for the recipients in non-receptive phase of menstrual cycle. In all, the females who were in receptive phase of menstrual cycle assessed scent attractiveness of male students higher then the females in non-receptive phase. Exam stress coincided with increase of the salivary cortisol resulting in decline of scent attractiveness in male students. The negative effect of exam was most prominent in students that failed exam and in student who aspired to be the best but failed. So, the exam stress and basal variation of stress-related physiological indexes, such as salivary cortisol, are mirrored in male chemical signals, which are recognized by females.
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