Nurse-midwives in a hospital birth center.
D003696:Delivery Rooms; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000453:epidemiology; D007743:Labor, Obstetric; D008427:Maternal Health Services; D008910:Minnesota; D009721:Nurse Midwives; D009873:Operating Rooms; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology