title: Prevention of prematurity: important and difficult.
authors.forename: W A
authors.initials: WA
authors.lastname: Altemeier
mesh_terms: D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007752:Obstetric Labor, Premature / Q000517:prevention & control*; D011247:Pregnancy; D011295:Prenatal Care