KEY FINDINGS: The U.S. late preterm birth rate rose 20% from 1990 to 2006. If the late preterm rate had not risen from the 1990 level, more than 50,000 fewer infants would have been delivered late preterm in 2006. On average, more than 900 late preterm babies are born every day in the United States, or a total of one-third of 1 million infants (333,461). Increases in late preterm births are seen for mothers of all ages, and for non-Hispanic white and Hispanic mothers. The rate for black mothers declined during the 1990s, but has been on the rise since 2000. Late preterm birth rates rose for all U.S. states, but declined in the District of Columbia. The percentage of late preterm births for which labor was induced more than doubled from 1990 to 2006; the percentage of late preterm births delivered by cesarean also rose markedly.
KEY FINDINGS: The U.S. late preterm birth rate rose 20% from 1990 to 2006. If the late preterm rate had not risen from the 1990 level, more than 50,000 fewer infants would have been delivered late preterm in 2006. On average, more than 900 late preterm babies are born every day in the United States, or a total of one-third of 1 million infants (333,461). Increases in late preterm births are seen for mothers of all ages, and for non-Hispanic white and Hispanic mothers. The rate for black mothers declined during the 1990s, but has been on the rise since 2000. Late preterm birth rates rose for all U.S. states, but declined in the District of Columbia. The percentage of late preterm births for which labor was induced more than doubled from 1990 to 2006; the percentage of late preterm births delivered by cesarean also rose markedly.
Authors: Michele L Okun; James F Luther; Stephen R Wisniewski; Dorothy Sit; Beth A Prairie; Katherine L Wisner Journal: J Womens Health (Larchmt) Date: 2011-10-03 Impact factor: 2.681
Authors: Barbara L McFarlin; Jennifer Balash; Viksit Kumar; Timothy A Bigelow; Xavier Pombar; Jacques S Abramowicz; William D O'Brien Journal: Ultrasound Med Biol Date: 2015-05-23 Impact factor: 2.998
Authors: Carmen Giurgescu; Barbara L McFarlin; Jeneen Lomax; Cindy Craddock; Amy Albrecht Journal: J Midwifery Womens Health Date: 2011 Jul-Aug Impact factor: 2.388
Authors: Jennifer L Richards; Michael S Kramer; Paromita Deb-Rinker; Jocelyn Rouleau; Laust Mortensen; Mika Gissler; Nils-Halvdan Morken; Rolv Skjærven; Sven Cnattingius; Stefan Johansson; Marie Delnord; Siobhan M Dolan; Naho Morisaki; Suzanne Tough; Jennifer Zeitlin; Michael R Kramer Journal: JAMA Date: 2016-07-26 Impact factor: 56.272