I was really surprised the article didn't mention this. To be fair it's apparently something that has been evolving for decades, so it wasn't so much prediction

I was really surprised the article didn't mention this. To be fair it's apparently something that has been evolving for decades, so it wasn't so much prediction but they definitely aren't inventing something wild. https://ourworldindata.org/fertility/ https://ourworldindata.org/fertility/