Group health program to reduce the incidence of preterm deliveries.
D005260:Female; D006279:Health Maintenance Organizations; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008910:Minnesota; D007752:Obstetric Labor, Premature / Q000517:prevention & control*; D010353:Patient Education as Topic; D011247:Pregnancy; D011295:Prenatal Care; D012306:Risk