Effects of obstetric hospitalization policy upon obstetric mortality: a survey of 4133 hospitals.
D005260:Female; D005313:Fetal Death; D006748:Hospital Departments; D006760:Hospitalization; D006784:Hospitals, Teaching; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008428:Maternal Mortality; D009738:Nursing Service, Hospital; D009773:Obstetric Nursing; D011247:Pregnancy; D014481:United States