fwiw, regarding illegal immigration mentioned before, Hispanic women (assuming an appreciable number of them are illegal to begin with) actually have about the same maternal mortality rate as whites and Asians. It's primarily a problem for black mothers.
One thing that confuses me a bit is the arbitrary 365 day cutoff. About half of these deaths occur outside of the 42 day window of medicaid support, apparently, and of those deaths, hypertension and drug overdoses are considered the two most common problems. Further, if you look at the trend line after 42 days, it's
virtually linear, like one of the most linear things I've ever seen in any kind of social study, which is counter-intuitive if complications from pregnancy are supposed to be diminished over time. Further, doesn't this measure inherently bias maternal mortality rates towards those that are pregnant more frequently? E.g., a population where the average woman has 730 post-partum days is naturally going to be underrepresented compared to one where it is perhaps closer to 1095, just because there's a higher probability of a random heart attack or drug overdose only tangentially related to the pregnancy. While Texas doesn't have the highest fertility rate, they're close to it.