Researchers are speculating about possible reasons. One says it's unclear whether the increase was a one-year statistical blip or the beginning of a more lasting trend.
The U.S. infant mortality rate rose 3% last year - the largest increase in two decades, according to the Centers for Disease Control and Prevention. White and Native American infants, infant boys and babies born at 37 weeks or earlier had significant death rate increases. The CDC's report, published Wednesday, also noted larger increases for two of the leading causes of infant deaths - maternal complications and bacterial meningitis.
infant mortality rate has been worse than other high-income countries, which experts have attributed to poverty, inadequate prenatal care and other possibilities. But even so, the U.S. rate generally gradually improved because of medical advances and public health efforts. The national rate rose to 5.6 infant deaths per 1,000 live births in 2022, up from from 5.44 per 1,000 the year before, the new report said.
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