The following graphs show the mean number of children by frequency of religious worship service attendance. The survey period covered is from 2000 to 2018 covering adults aged 30 through old age, so TFRs are higher across the board than they are among people in their reproductive primes today:
There is nothing to the color scheme in the first graph. Those are default colors. It’s a little easier to comprehend at first glance than the second graph is, but both are interesting so both were included.
The relationship between fertility and religiosity is weakest among blacks. Parenthetically but not unrelatedly, the inverse correlation between fertility and intelligence is most pronounced among blacks.
Orthodox Jews are fecund, non-Orthodox Jews are not.
GSS variables used: RACEHISP(1)(2)(3), RACECEN1(4-10), HISPANIC(0), RELIG(1-2,4-13)(3), CHILDS, YEAR(2000-2018), AGED(30-89), ATTEND(0)(1-2)(3-4)(5-6)(7-8)