Category Archives: Scientific evidence that human pheromones affect changes in the hormone levels in the brains of other people.

Abstract The significance of odours for human reproduction is partially neglected by medical sciences. Nevertheless, it can be shown that male pheromones (androstenol/androstenone) from male sweat have a direct impact on female menstrual cycles and ovulation. Furthermore, female pheromones (copulins), which are present in vaginal secretions, influence male perception of females and may induce hormonal …

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Abstract The effect of sensory input on hormones is essential to any explanation of mammalian behavior, including aspects of physical attraction. The chemical signals we send have direct and developmental effects on hormone levels in other people. Since we don t know either if, or how, visual cues might have direct and developmental effects on …

Continue reading “Human pheromones: integrating neuroendocrinology and ethology”

Introduction Menstrual synchrony, the convergence of the onset date of the menstrual flow, is observed in women living together (Weller and Weller, 1993). Menstrual synchrony has been shown to be mediated by axillary odour (Stern and McClintock, 1998). Axillary odours from women in the follicular phase (FP) of the ovulatory cycle shorten both the time …

Continue reading “Effects of 5α-Androst-16-en-3α-ol on the Pulsatile Secretion of Luteinizing Hormone in Human Females”

Abstract We examined the effect of axillary compounds on pulsatile secretion of serum luteinizing hormone (LH). Axillary compounds were collected from donor women in the follicular phase (FP) and the ovulatory phase (OP) and were treated with isopropyl alcohol (IPA). The recipient was not exposed to either axillary compounds or IPA for the first 4 …

Continue reading “Axillary pheromones modulate pulsatile LH secretion in humans”

Abstract Human underarm secretions, when applied to women recipients, alter the length and timing of the menstrual cycle. These effects are thought to arise from exposure to primer pheromones that are produced in the underarm. Pheromones can affect endocrine (primer) or behavioral (releaser) responses, provide information (signaler), or perhaps even modify emotion or mood (modulator). …

Continue reading “Male axillary extracts contain pheromones that affect pulsatile secretion of luteinizing hormone and mood in women recipients”

Abstract The anatomical pathways for processing of odorous stimuli include the olfactory nerve projection to the olfactory bulb, the trigeminal nerve projection to somatosensory and insular cortex, and the projection from the accessory olfactory bulb to the hypothalamus. In the majority of tetrapods, the sex-specific effects of pheromones on reproductive behavior is mediated via the …

Continue reading “Smelling of odorous sex hormone-like compounds causes sex-differentiated hypothalamic activations in humans”

Abstract Rodents use chemosignals to alter endocrine balance in conspecifics. Although responses to human sweat suggest a similar mechanism in humans, no particular component of human sweat capable of altering endocrine balance in conspecifics has yet been isolated and identified. Here, we measured salivary levels of the hormone cortisol in women after smelling pure androstadienone …

Continue reading “Smelling a single component of male sweat alters levels of cortisol in women”