Researchers believe that women stay away from male relatives when they are most fertile for evolutionary reasons.
The Comedy, and the Horror, of the Infertility Plot - The New York Times
Men are also at the optimal age to become fathers
A Breakdown of the Fertility Timeline
Women 'avoid their fathers when they are at their most fertile
When Are You Most Fertile?
U.S. Women More Likely to Have Children Than a Decade Ago
Mariam Nabatanzi - Wikipedia
8 Signs of Fertility to Look For Each Month
When Is a Woman Most Fertile? – Forbes Health
Netflix Film 'Our Father' Fertility Doctor Used Own Sperm in Patients
Why Am I Not Getting Pregnant?
Why have four children when you could have seven? Family planning in Niger, Working in development
Aspiring Fathers Open Up About the Emotional Toll of Fertility Issues - The New York Times