Feeling jealous? Maybe it’s that time of the month. Research continues to reveal that many relational behaviors are tied to a woman’s menstrual cycle. The latestfindings show that women exhibit higher levels of jealousy while ovulating. While the pattern is clear, the explanation is not. Being jealous while being fertile is not likely to help a woman get pregnant. From an evolutionary point of view, a man guarding a fertile female makes much more sense. But, a fertile woman keeping a closer eye on her man, what’s the point? One possible explanation – women tend to get more competitive with each other during their fertile phase. Perhaps this increased sense of competition leads to feelings of insecurity and a more watchful eye. Eventually someone will figure this mystery out.