New research suggests that women are tougher than men. According to evolutionary theory, women living in poorer communities are predisposed to have daughters to ensure survival of the family line because the men are at greater risk of dying younger. The reversal of this theory hints why rich, married, well-educated women may tend to have more sons.
Full article Why Rich Women Have Sons (SMH)
Berno: This is certainly an interesting research. I wonder if the readers esp females have any comments about this finding.