The CDC has fertility rates by state, but these are not given by year of age.
If other data with age-specific fertility rates by state do not exist, perhaps an acceptable compromise is to use adjust the overall fertility rates in the US by the state-specific fertility rates. This would entail shifting the lifecycle pattern of US fertility rates up or down to hit the average fertility rate in a given state.
The CDC has fertility rates by state, but these are not given by year of age.
If other data with age-specific fertility rates by state do not exist, perhaps an acceptable compromise is to use adjust the overall fertility rates in the US by the state-specific fertility rates. This would entail shifting the lifecycle pattern of US fertility rates up or down to hit the average fertility rate in a given state.