With the development of society, the decline of fertility rate is a common social phenomenon. In Shanghai, China, the fertility rate was lower than the mortality rate in11990s, and the population showed negative growth. Nowadays, the phenomenon of fertility rate is somewhat hidden in big cities because of the increase of foreign population.

The analysis reason is also very clear. In modern society and big cities, the cost of living is high, and the cost of giving birth to and raising children is high. This is why big cities don't have two children.

The survival pressure of modern people is also a reason, so is the pursuit of self-enjoyment. It is now that young people's ideas have changed. Among the highly educated urban women, unmarried women marry late everywhere. Why is the fertility rate not low?

Korea is a moderately developed country, and the birth rate, including Japan, is an inevitable social phenomenon.

I hope to adopt.