Alternative birth centers.
D002140:California; D002170:Canada; D003258:Consumer Behavior; D005260:Female; D006268:Health Facilities; D006769:Hospitals, General; D006801:Humans; D007743:Labor, Obstetric; D009519:New York City; D009721:Nurse Midwives; D009773:Obstetric Nursing; D009922:Oregon; D011181:Postnatal Care; D011247:Pregnancy; D011295:Prenatal Care