Only for men, though. And in the case of Sweden, specifically, IQ and fertility were positively correlated for men who were born in the postwar period. https:/

Only for men, though. And in the case of Sweden, specifically, IQ and fertility were positively correlated for men who were born in the postwar period. https://royalsocietypublishing.org/doi/10.1098/rspb.2019.0359 https://royalsocietypublishing.org/doi/10.1098/rspb.2019.035...