title: Practice time in prepared childbirth.
mesh_terms: D001945:Breathing Exercises; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D009321:Natural Childbirth; D010806:Physical Education and Training; D011247:Pregnancy; D011295:Prenatal Care; D011795:Surveys and Questionnaires; D013997:Time Factors