According to the UN, with longer life expectancy and decreased childhood mortality, the global fertility rate in all countries is likely to begin declining toward the end of the century.

This week, South Korea reported that, as of 2023, the country's fertility rate has dropped to just 0.72 births per woman, shattering its record.Without migration, a population replenishes itself at about 2.1 each generation.

According to the United Nations Population Division, Asia, particularly count...