Sorry, I should have been clearer, as I wasn't aiming to suggest it was a genetic trait. As another commenter indicated below, as well as another in this thread, I was asking in relation to the upbringing perspective.
Although I'm well aware upbringing isn't brainwashing, and so even those anti-abortion parents couldn't prevent their children from being for bodily autonomy, but I thought it worth asking about to see what others might think. If you read through some conservative leaning texts, some of them unambiguously talk about having children for the express purpose of perpetuating their beliefs, so at least some will view this trend as in their favor.
Also to be completely clear here: I'm pro-choice, and for bodily autonomy.
Simply checking out the media without prior research