Abstract

The testosterone derivative androstadienone and the estrogen-like steroid estratetraenol are possible human pheromones. Inhalation of these compounds causes anterior-hypothalamic activity on PET scans, with differences according to the subjects’ sex. These authors studied the pattern of brain activation on PET scans in 12 heterosexual men, 12 homosexual men, and 12 heterosexual women. Scans of both …

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