US because English and can have nicer weather, also have citizenship by birth, so can work there no issue.
Yeah, still shocks me when I see people with 10+ immediate family, just doesn't really exist for higher educated people anymore.
On the contrary, many higher educated people have a lot of offspring, what I do agree with is that people who are educated are less likely to have more than 2 kids but many do, It's their choice afterall.
Take Elon Musk for example he has 7 kids.
What you also have to consider is the religious aspect, ie: people of the Islamic faith have many kids to spread their religion, according to the Quran children are a gift from God.
Overall the total fertility rate is going down as the general population realises they just can't afford it.