title: Equipment for the recording of tractive power in vaccum extractions.
mesh_terms: D005113:Extraction, Obstetrical / Q000295:instrumentation*; D005260:Female; D005318:Fetal Heart / Q000502:physiology; D006339:Heart Rate; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation; D011247:Pregnancy; D014620:Vacuum Extraction, Obstetrical / Q000295:instrumentation*