While it is difficult to quantify exactly how much these policies have cost, South Korean President Yoon Suk-yeol recently said his country had spent more than $200bn (£160bn) over the past 16 years on trying to boost the population. Yet last year South Korea broke its own record for the world's lowest fertility rate, with the average number of babies expected per woman falling to 0.78.
In neighbouring Japan, which had record low births of fewer than 800,000 last year, Prime Minister Fumio Kishida has pledged to double the budget for child-related policies from 10tn yen ($74.7bn; £59.2bn), which is just over 2% of the country's gross domestic product.