[Isinlor]

This is also well visible in post-communist countries.

During communism there was nothing in the shops, big families were living in small apartment with parents sleeping on beds opening from the wall. There was no disposable diapers. In general people had not much career opportunities.

And then communism collapsed, and as people became richer trough capitalism fertility rates plummeted.

And there was no policies to convince people against having big families.

The basic pattern is the same across the world poor countries have high fertility rates. Rich countries have low fertility rates. And as poor countries become rich their fertility rates go down.