“…The existence of ''human pheromones'' also may play a role in the numerous reports in the literature suggesting that humans might have some type of conspecific ''pheromone''-detecting system, particularly in relationship to the synchronization of women's menstrual cycles (McClintock, 1971;Russell, 1976;Russell et al, 1980;Stern and McClintock, 1998;Veith et al, 1983;Weller and Weller, 1997). This phenomenom and evidence of female human pheromones and their effects have been well illustrated in a recent study by Stern and McClintock (1998).…”