title: Preparation courses for childbirth in primipara. A comparison.
mesh_terms: D001007:Anxiety; D001519:Behavior; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D010806:Physical Education and Training; D011247:Pregnancy; D011615:Psychotherapy, Group / Q000379:methods*; D013997:Time Factors