title: Doppler ultrasound in obstetric practice: 1.
abstract: The Doppler effect has been recognized for around 150 years. The practical application of the phenomenon to the study of fetomaternal haemodynamics has been applied for almost 20 years. This article considers the theory of the effect in relation to obstetric practice.
authors.affiliation: University of Birmingham, Birmingham Maternity Hospital.
authors.forename: R B
authors.initials: RB
authors.lastname: Beattie
mesh_terms: D001783:Blood Flow Velocity; D004301:Doppler Effect; D005260:Female; D006801:Humans; D011247:Pregnancy; D011673:Pulsatile Flow; D016216:Ultrasonography, Prenatal / Q000295:instrumentation