title: A pulsed Doppler system incorporated into a Diasonograph.
mesh_terms: D004301:Doppler Effect; D005260:Female; D005333:Fetus / Q000502:physiology; D006801:Humans; D011247:Pregnancy; D012119:Respiration; D014465:Ultrasonics / Q000295:instrumentation*; D014463:Ultrasonography