title: On-demand analgesia equipment.
mesh_terms: D000698:Analgesia / Q000295:instrumentation*; D000773:Anesthesia, Obstetrical / Q000295:instrumentation*; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy; D012646:Self Administration; D013997:Time Factors