The myth of painless childbirth (the John J. Bonica lecture).
D000367:Age Factors; D000767:Anesthesia, Epidural; D000773:Anesthesia, Obstetrical; D001827:Body Height; D001835:Body Weight; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D009321:Natural Childbirth; D010146:Pain / Q000209:etiology / Q000503:physiopathology* / Q000523:psychology; D010298:Parity; D010353:Patient Education as Topic; D011247:Pregnancy; D012959:Socioeconomic Factors