After two decades of improvement, infant mortality in the US is getting worse as an increasing number of mothers lack access to care.

Deaths among US infants less than a year old rose 3% in 2022 to 5.6 per 1,000 live deliveries, according to provisional data from the Centers for Disease Control and Prevention. It was the first statistically significant year-over-year increase in the country’s infant mortality rate since 2002.