Hispanic women are just as poor but their infant mortality rate is about at the white level. One would think that if the cause is stress hormones due to racism there would be some effect on the at least somewhat discriminated against Hispanics.
On the face of it it does not seem like a good explanation.
Neither for that matter does the behavioral explanation, where its due to neglectful mothers or murderous paramours, because one would expect a continuum with respect to other populations in poverty that also probably misbehave at a higher rate than whites.
There almost certainly is something else.
The difference is that many blacks do NOT take very good care of their children. No one wants to admit it, but it’s true.
It appears to me that Hispanic women are just much more content/fulfilled as mothers, as opposed to bearing unloved children for financial gain/a life of leisure.
We have a rising Hispanic population in our town. I have no idea of their legal status but they seem to have intact family units and care for and dote on their kids at level that makes our whites at the same socioeconomic level look terrible.