If a man without a woman is like a fish without a bicycle, as the feminist slogan has it, can the behaviour of our aquatic ancestors teach us anything about human relations ?
Sex differences in personality are believed to be comparatively small. However, research in this area has suffered from significant methodological limitations. We advance a set of guidelines for overcoming those limitations:
Research in the Journal of Leukocyte Biology suggests a woman's ovarian cycle plays a role in susceptibility to infection. Specifically, researchers found women are most susceptible to infection during ovulation than at any other time during the reproductive cycle.