Improving pregnancy outcome with nurse-midwifery care.
D005006:Ethnicity; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008427:Maternal Health Services / Q000592:standards*; D009721:Nurse Midwives; D011203:Poverty; D011247:Pregnancy; D011295:Prenatal Care / Q000592:standards; D014481:United States