The number of people dying in the U.S. from pregnancy-related causes has more than doubled in the last 20 years, according to a new study, published in JAMA, the Journal of the American Medical Association.

And while the study found mortality rates remain “unacceptably high among all racial and ethnic groups across the U.S.,” the worst outcomes were among Black women, Native American and Alaska Native people.

The study looks at state-by-state data from 2009 to 2019. Co-author Dr. Allison Bryant, an obstetrician at Massachusetts General Hospital in Boston, says maternal death rates in the U.S. just keep getting worse. (…)