Regionalization of perinatal care.
D003120:Colorado; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000628:therapy*; D007363:Intensive Care Units, Neonatal; D008427:Maternal Health Services / Q000458:organization & administration*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000628:therapy*; D012017:Referral and Consultation; D012041:Regional Medical Programs / Q000458:organization & administration*; D012306:Risk; D014589:Utah; D014959:Wyoming