Earlier quoted context omitted.
I don’t think people are preferentially aborting females to any appreciable degree in the west. Received wisdom is that boys are a pain in the ass to rear. And, anecdotally, most parents are interested in having one of each, not in having one particular sex over the other.
I think a more likely factor would be stopping after the first child if it's what you wanted, and trying for more if you really wanted the other. But there's so many other confounding factors (e.g. do billionaire men have more testosterone, as either a cause or an effect of their success, do they have children when they are older but the mothers are younger and so on) that it offers no evidence on its own.
In my experience, the primary consideration for most couples is the number of children. Then, if they want more than one, they want one of each. For whatever my personal experience is worth (mostly with middle and upper-middle class Coastal urban people).