Brain's reward circuit activity ebbs and flows with a woman's hormonal cycle
Posted by admin / Under Menstrual CycleFluctuations in sex hormone levels during women's menstrual cycles affect the responsiveness of their brains' reward circuitry, an imaging study at the National Institute of Mental Health (NIMH), a component of the National Institutes of Health (NIH), has revealed. While women were winning rewards, their circuitry was more active if they were in a menstrual phase preceding ovulation and dominated by estrogen, compared to a phase when estrogen and progesterone are present. "These first pictures of sex hormones influencing reward-evoked brain activity in humans may provide insights into menstrual-related mood disorders, women's higher rates of mood and anxiety disorders, and...
Women’s preference for dominant male odour: effects of menstrual cycle and relationship status
Posted by admin / Under Menstrual Cycle1 J. Havlicek and others Male dominance and odour attractiveness Biol. Lett. Biol. Lett.doi:10.1098/rsbl.2005.0332Published online Women’s preference for dominant male odour: effects of menstrual cycle and relationship status Jan Havlicek(1),*, S. Craig Roberts (2)and Jaroslav Flegr (3)(1) Department of Anthropology, Faculty of Humanities, CharlesUniversity, Husnikova 2075, 155 00 Prague, Czech Republic (2)Evolutionary Psychology and Behavioural Ecology Research Group,School of Biological Sciences, University of Liverpool, LiverpoolL69 3BX, UK (3)Department of Parasitology, Faculty of Science, Charles University,Vinicna 7, 127 44 Prague, Czech Republic*Author for correspondence ( jan.havlicek@fhs.cuni.cz) Body odour may provide significant cues abouta potential sexual partner’s genetic quality,reproductive status and health....
