Locations
United States
Preterm births
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Definition and Source
PROVIDER
Definition
Babies born with a gestational age of less than 37 completed weeks.
Birth certificates that did not report gestational age were not included in this tabulation. Puerto Rico and Virgin Islands are not included in the U.S. average.
Birth certificates that did not report gestational age were not included in this tabulation. Puerto Rico and Virgin Islands are not included in the U.S. average.
Data Source
Population Reference Bureau analysis of 2007 to 2021 data from the National Center for Health Statistics (NCHS). Child Trends analysis of 1990-2006 Natality MicroData files from Centers for Disease Control and Prevention, National Center for Health Statistics.
Notes
Data are provided for the 50 most populous cities according to the most recent Census counts.
Cities for which data is collected may change
over time.
Last Updated
April 2023