Is There a Cultural Stigma to Having Children?

Fertility changes over the last couple of centuries suggests that it can't be purely biological, right? We wouldn't be having like one fourth number of children as we had in our Great, Great, Great Grandparents generation if it were all biology. So there has to be a cultural piece of the story and maybe a much bigger cultural piece than would be intuitive. There might be some cultural pressure to have children but dramatically less.