title: Errors and artifacts encountered in the monitoring of fetal respiratory movements using untrasound.
mesh_terms: D005260:Female; D005333:Fetus / Q000502:physiology*; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000592:standards; D011247:Pregnancy; D012119:Respiration; D014463:Ultrasonography