I think the biggest obstacle is the progress of thought and women's thought. Nowadays, most women are independent in thought and economy, and their spiritual sustenance is no longer on their spouses and children. This is the progress of society. Women have their own ideas and can do what they want, not limited to the shackles of tradition.
Some people may say that this idea is too selfish. In fact, you can think about it: you can earn money by yourself, you can enrich your spiritual world when you have time, you can travel regularly, you can set goals and work hard to achieve them, and then after having children, the pressure of life increases, the quality of life declines, your career is affected, and the focus of life is on children! What would you choose! (Actually, when writing this, I feel that our parents' generation is really great. )
Another point is economic pressure. The cost of raising a child is too high now. Not to mention baby milk powder and diapers, you have a child. You have to consider the school district, you have to find a good school, you have to find him a training class ... These have scared off many young people, but now the national policies are constantly improving, such as maternity leave, for example, reducing the burden of education, which is also constantly alleviating the pressure on young people. The above only represents my personal views on this issue.