The economic pressure is too great.
The cost of modern society is getting higher and higher, and families need more economic resources to raise their children. Especially in some developed countries, the cost of children's education, medical care and housing is very high. This will bring economic pressure to many couples, thus affecting their fertility will.
Occupational stress is great.
The competition in modern society is fierce, and many couples need to spend more time and energy to pursue career development. This may affect their reproductive decision-making, because childbirth requires more time and energy to take care of children.
The improvement of education level
The improvement of education level in modern society makes people pay more attention to self-development, which also means that more women enter the workplace. This makes many women postpone giving birth or choose between career development and giving birth.
Changes in social concepts
The concept of modern society is constantly changing, and so are the views on marriage, family and occupation. Many young people pay more attention to self-realization and freedom, and are unwilling to leave their life and future plans entirely to their children and families.