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QuickStats: Rate* of Very Low
Birthweight,† by Age of Mother and
Multiple-Birth Status --- United States, 2003
* Per 100 live births.
† Defined as <1,500 g (<3 lbs, 4 oz).
The risk of giving birth to a very low birthweight infant is higher for both younger and
older mothers. Much of the added risk among older women is attributable to higher multiple birth
rates. On average, infants born in multiple births are smaller than infants born in single births.
SOURCES: National Vital Statistics System, 2003 natality file; Martin JA, Hamilton BE, Sutton PD, et
al. Births: final data for 2003. Natl Vital Stat Rep 2005;54(2). Available at
http://www.cdc.gov/nchs/data/nvsr/nvsr54/nvsr54_02.pdf.
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