With more and more married couples chose not to have children; the country will experience a declining birth rate. This will result in the change of demographic structure where there is a larger proportion of elderly than working adult. Having an ageing population will mean that the workforce are getting older too. Most old workers are harder to be retrained for new essential skills and take a longer time to cope with technology changes. This will leave many professional jobs such as engineers or technicians unfilled, hence there will be a shortage of labour and talent. This will make the country less attractive to foreign investors which contribute to Gross Domestic Product (GDP), sustaining a high economic growth. For example, countries in Europe are facing this problem due to the declining birth rate, the population is ageing so rapidly that by 2015, the natural increase will be negative. Then Europe will face the shortage of labour and they will lose competitiveness against active countries such as China.
As the trend continues to rise, the replacement level of the country will definitely fall below the