Dynamics of tracheal fluid flow in the human fetus, studied with pulsed Doppler ultrasound.
D001826:Body Fluids / Q000502:physiology; D005260:Female; D005333:Fetus / Q000502:physiology*; D006801:Humans; D008433:Mathematics; D011247:Pregnancy; D012119:Respiration; D012212:Rheology; D014132:Trachea / Q000196:embryology / Q000502:physiology*; D014463:Ultrasonography