'Teach-in' on Doppler techniques of ultrasound.
D001790:Blood Physiological Phenomena; D004301:Doppler Effect; D005318:Fetal Heart / Q000502:physiology; D005323:Fetal Monitoring / Q000379:methods; D006339:Heart Rate; D006801:Humans; D012212:Rheology; D014463:Ultrasonography; D014652:Vascular Diseases / Q000175:diagnosis