I don't think there's a monotonic curve where more development leads to lower fertility. Both Sweden and New Zealand have higher HDIs than SK, but their fertili

I don't think there's a monotonic curve where more development leads to lower fertility. Both Sweden and New Zealand have higher HDIs than SK, but their fertility rates are higher than many countries which are considered less developed I mean, there's definitely a correlation globally speaking, but after a certain point of development (e.g countries with HDI 0.8 and above) it looks like the correlation isn't as strong Edit: this Wikipedia page shows what I'm referring to, see section on Contrary Findings -> J-curve https://en.wikipedia.org/wiki/Income_and_fertility https://en.wikipedia.org/wiki/Income_and_fertility You can see on the chart, for HDIs >= 0.8 there isn't a visible trend of decrease to the level where SK is currently