title: Are preterm births on the decline in the United States? Recent data from the National Vital Statistics System.
abstract: Following a long period of fairly steady increase, the U.S. preterm birth rate declined for the second straight year in 2008 to 12.3 percent, from 12.8 percent in 2006. This marks the first 2-year decline in the preterm birth rate in nearly three decades. Preterm birth rates declined from 2006 to 2008 for mothers of all age groups under age 40, for the three largest race and Hispanic origin groups and for most U.S. states. The percentage of preterm births was down for all types of deliveries from 2006 to 2008, for cesareans and for induced and noninduced vaginal deliveries.
authors.affiliation: Centers for Disease Control and Prevention, National Center for Health Statistics, Division of Vital Statistics, Reproductive Statistics Branch, Hyattsville, Maryland 20782, USA.
authors.forename: Joyce A
authors.initials: JA
authors.lastname: Martin
authors.forename: Michelle J K
authors.initials: MJ
authors.lastname: Osterman
authors.forename: Paul D
authors.initials: PD
authors.lastname: Sutton
mesh_terms: D000328:Adult; D002585:Cesarean Section / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D007751:Labor, Induced / Q000706:statistics & numerical data; D008875:Middle Aged; D011247:Pregnancy; D047928:Premature Birth / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology; D014798:Vital Statistics; D055815:Young Adult