Birthweight and Gestation

Data are for the U.S.

  • Number of babies born low birthweight (less than 2500 grams): 318,873
  • Percent born low birthweight: 8.28%
  • Percent born very low birthweight: 1.41%
  • Number of preterm births: 382,726
  • Percent born preterm: 9.93%

Source: Births: Final Data for 2017, tables 21, 23, I-19, I-21 pdf icon[PDF – 1.1 MB]

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Page last reviewed: March 31, 2017