Birthweight and Gestation
Data are for the U.S.
- Number of babies born low birthweight (less than 2500 grams): 311,932
- Percent born low birthweight: 8.52%
- Percent born very low birthweight (less than 1500 grams): 1.38%
- Number of preterm births: 383,979
- Percent born preterm: 10.49%
Source: Births: Final Data for 2021, tables 13, 20, and 22 [PDF – 1 MB]
More data
- Birth data
- Maternal Characteristics and Infant Outcomes by Hispanic Subgroup and Nativity: United States, 2021
- Prepregnancy Body Mass Index and Infant Outcomes by Race and Hispanic Origin: United States, 2020 [PDF – 364 KB]
- Exploring the Decline in the Singleton Preterm Birth Rate in the United States, 2019-2020
- Maternal Characteristics and Infant Outcomes in Appalachia and the Delta [PDF – 1 MB]