The only moral way to fix the falling birthrate is to outlaw contraception and abortion, increase economic desperation to create a surge of underemployed young men, and increase the amount of anti-woman rhetoric and policy in popular culture and government.
You see, an increase in unemployment leads to an increase in baseline crime statistics, and an increase in dehumanizing and hateful attitudes towards women increases the rate of rape, which is now harder to prosecute. Devoid of any options, the birth rate rises and in many cases women are forced by implicit circumstances to limit their lives in ways they would not otherwise choose.
It’s a tactic explored by the Romanians, but it didn’t pan out. Clearly they allowed too many exceptions for maternal well-being, birth defects, rape and incest.