Even today, the gap between fertility rates between those with and without college degrees is statistically significant. The big difference between now and then is that the “college-educated” constitutes women as well, with women starting in 2015 attaining more college degrees than men.

Birth Rate Declining Among College Men: Statistics for Harvard and Yale Show Steady Decrease in Number of Graduates’ Children and More Childless Marriages

From December 17, 1916