title: An ultrasonic real-time scanner with pulsed Doppler and T-M facilities for foetal breathing and other obstetrical studies.
mesh_terms: D004301:Doppler Effect; D005260:Female; D005333:Fetus / Q000502:physiology*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D012119:Respiration; D013997:Time Factors; D014159:Transducers; D014463:Ultrasonography