Researchers believe that women stay away from male relatives when they are most fertile for evolutionary reasons.
The U.S. Fertility Rate Is Down, Yet More Women Are Mothers - The New York Times
How much can we control our own fertility?
India fertility fall puts policymakers on clock to avoid Japan
How Do I Know if I'm Fertile?
Can You Get Pregnant After Ovulation?
How To Calculate Safe Period To Prevent Pregnancy?
The Comedy, and the Horror, of the Infertility Plot - The New York Times
Women 'avoid their fathers when they are at their most fertile
8 Ways in Which Women Can Boost Their Fertility β Wellbeing Nutrition