Prevention of prematurity: can we do it in America?
D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000517:prevention & control*; D007752:Obstetric Labor, Premature / Q000517:prevention & control*; D011247:Pregnancy; D012306:Risk; D014481:United States