MedicalResearch.com Interview with: Dr. Julia Stern (Jünger) Georg-August-University Göttingen Georg-Elias-Müller-Institute of Psychology Biological Personality Psychology Göttingen  MedicalResearch.com: What is the background for this study? Response: The main background for this study was the Good Genes Ovulatory Shift Hypothesis. This Hypothesis is quite famous in evolutionary social sciences. It claims that women’s mate preferences should shift across their ovulatory cycle, regulated by changing hormone levels (mainly estradiol and progesterone). More precisely, when fertile, women should be sexually attracted to men who displayed assumed indicators of genetic quality, e.g. dominant behavior, whereas when not fertile, women should prefer to mate with potential long-term partners. This Hypothesis has received criticism in the recent years, because of studies not finding any evidence for it, studies with positive evidence were criticized for methodological problems, and studies claiming that previously presumed indicators of good genes do not really display good genes at all. All this criticism led to a debate about the existence of mate preference shifts across women’s ovulatory cycle. My colleagues and I wanted to contribute to this debate by conducting a large study with strong research methods. (more…)