Do you read this as distinct from the global trend that female lifetime fertility drops with increases in years of schooling (not stabilizing until safely below

Do you read this as distinct from the global trend that female lifetime fertility drops with increases in years of schooling (not stabilizing until safely below 'large family')? At least in every US state, it seems that larger households have higher household income, though my stat only goes to household size of 4 (https://www.justice.gov/ust/eo/bapcpa/20201101/bci_data/median_income_table.htm https://www.justice.gov/ust/eo/bapcpa/20201101/bci_data/medi...). It seems to be true that wealthy and highly educated women are less likely to have many or any children.And at the other end, I think it's reasonable to suspect that having children has a causal relationship with unwed mothers not subsequently marrying.