Men like to suggest that highly intelligent women routinely were very fertile and that they have a low fertility rate these days because of FEMINISM.
But this is not an easy question to answer. Women who are very intelligent are even less common than highly intelligent men and it is pretty clear from the historical record that those guys were never all that fertile. But when it comes to the ladies, there’s this idea that smart women routinely had ten kids and still would but for FEMINISM. It is possible they had more children on average than they do now, but it would be hard to prove the difference was massive if so, at least in America, which has a history going back to colonial times of suppressed fertility for all white women, smarty-smarts not excluded. When you are talking about one or two women per hundred, at maximum, that they had an extra .4 kid in the past is meaningful, but hardly a sign of eugenic breeding QUASHED BY FEMINISM.
As part of the data I’m scrounging up, this is partly relevant. I might end up putting together some historical trend lines, but then again, we are talking about very very very few women (130 IQ or higher), so it seems a bit of a rouged herring.
Modestly above average in smarts women were clearly more fecund on average, but the 1/1000 types and even most of the 1/100 types, it just doesn’t match up with what little information we have about that kind of woman’s life in the past that such women were much more fertile than they are now.
ETA: The guy who wrote the original post and makes the argument I’m talking about all over the comments is a Boomer man in academia who had five kids. That is, he and his wife had children in the last dregs of “the village” helping with the kids and also pre-internet and he smugly (as Boomers do) acts like there’s no real obstacles to having more children. Nevermind that even when he was having five, Boomer women were very much not making that choice anymore. As I noted in a different post, ” In 1970, about one woman (all races) in five had five or more kids. By 1985 it was less than one woman in ten, and by 1990 it was around one woman in twenty.” Cochran was born in 1953. So during the time he and his wife had kids, women of all brainy-levels went from 20% having five kids to under 10% doing so. This is a massive cultural shift and the guy lalaing that people (smart women) are just silly to not have five, after all they are “more affordable than ever before!” is the precise sort of clever silliness his post refers to.