Paper: Social trust and fertility intentions: Evidence from China with causal and structural insights - https://www.sciencedirect.com/science/article/abs/pii/S10575... | https://doi.org/10.1016/j.irfa.2025.104616

However scientifically correct the "(In China)" might be, I'd assume the same "Low Trust => Baby Bust" applies is true in 'most every developed country.