title: The epidemiology of preterm birth.
abstract: The epidemiologic characteristics of women who deliver their infants before term birth are clues to the cause of this most important obstetric problem.
authors.affiliation: Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, 1654 Upham Drive, Columbus, OH 43210, USA. iams.1@osu.edu
authors.forename: Jay D
authors.initials: JD
authors.lastname: Iams
mesh_terms: D000022:Abortion, Spontaneous; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007752:Obstetric Labor, Premature / Q000453:epidemiology*; D011247:Pregnancy; D012307:Risk Factors; D014481:United States / Q000453:epidemiology