The inverse relationship between fertility and educational attainment is more pronounced among people of color than among whites and more pronounced among women than among men:

When it comes to educational attainment the inverse correlation with fertility is barely detectable among white men, while it is quite pronounced among non-white women.

If hypergamy is real, we would expect educational attainment to be more "detrimental" to female than to male fecundity. High status men will pair off with women of more modest status than themselves more readily than high status women will pair off with lower status men.

GSS variables used: CHILDS, YEAR(2000-2018), RACEHISP, SEX, DEGREE, AGE(35-89)