Access to birth control could be a much larger factor. Catholics are famously anti birth control, and Protestants only began accepting it starting in 1940, so t

Access to birth control could be a much larger factor. Catholics are famously anti birth control, and Protestants only began accepting it starting in 1940, so the 1973 roe v wade decision correlated with a generation which had more societal acceptance of birth control. Many Protestant denominations are still divided on the issue. https://en.m.wikipedia.org/wiki/Protestant_views_on_contraception https://en.m.wikipedia.org/wiki/Protestant_views_on_contrace...