Abstract Social communication by means of odor signals is widespread among mammals. In pigs, for example, the C19-steroids 5-α-androst-16-en-3-one and 5-α-androst-16-en-3-ol are secreted by the boar and induce the mating stance in the sow. In humans, the same substances have been shown to be compounds of body odor and are presumed to affect human behavior. …
Abstract It has been demonstrated that exposure to men has the capacity to shorten the menstrual cycle in women. In the present study, the impact of the variables of sleeping arrangements and sexual activity were examined on both menstrual cycle length and the occurrence of ovulation as determined by basal body temperature charts. It was …
Continue reading “Exposure to men influences the occurrence of ovulation in women”
Abstract Menstrual synchrony in human females has previously been demonstrated among women attending a predominantly female university as well as among women attending coeducational universities. In each of these studies, women who spent the most time together were most likely to show the menstrual synchrony. In this experiment, the possibility that substances in axillary secretions …
AbstractPrevious research on the reproductive cycle and olfactory sensitivity in women did not directly compare threshold levels for social and environmental odors. Here, using a staircase method, we used successive dilutions to establish olfactory thresholds for Androstadienone – a social odor produced by men, and rose – an environmental odor providing trace elements necessary for …
Abstract Previous studies have shown that menstrual cycle length and fertility are affected by a regular pattern of either: (1) intimate contact with men; or (2) contact with extracts from male axillary secretions; and (3) the axillary extracts of women. Experiments utilizing axillary extracts employed a controlled, double-blind research design using either extract or placebo. …
Abstract To explore the possibility that compounds which were identified as pheromones in experimental animals mediate human menstrual synchrony, we examined the relationship between menstrual synchrony and the ability to smell putative pheromones, 5α-androst-16-en-3α-ol (3α-androstenol) and 5α-androst-16-en-3-one (5α-androstenone). When we examined menstrual synchrony among 64 women living together in a college dormitory, we found that …
Abstract Human body odours have been reported to influence female mate choice. Women prefer the odours of immunocompatible men and, during their fertile period, judge the body odours of men with symmetrical bodies–which is indicative of genetic quality–as sexy and pleasant. The reproductive success of men largely depends on mating with fertile women, but it …
Continue reading “Female body odour is a potential cue to ovulation”
AbstractSynchronization of menstrual cycles among women living together in a college dormitory suggests that mutual interaction may have a strong influence on the length of the menstrual cycle. Studies on the influence of pheromones on mouse cycles and other species have revealed that social groups affect the functioning of the endocrine system. Although few studies …
Continue reading “Synchronization and suppression of the menstrual cycle”
Abstract BACKGROUND: To date, there has not been an investigation to determine whether lactating women and their infants influence the ovarian function of other women with whom they interact. METHODS: In a randomized, double‐blind, placebo‐controlled study of 47 nulliparous women, we utilized both within‐ and between‐subjects controls to assess the effects of sustained exposure to …
Continue reading “Effects of breastfeeding chemosignals on the human menstrual cycle”
Abstract Previous studies of reproductive state and olfactory sensitivity in women have not directly compared thresholds for social and environmental odors. Here, we used successive dilutions presented in a staircase protocol to determine olfactory thresholds for androstadienone, a social odor produced by men, and rose, an environmental odor signaling a source of micronutrients essential for …
Continue reading “Effects of reproductive state on olfactory sensitivity suggest odor specificity”
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