How effective is Doppler ultrasound for assessing foetal wellbeing in high-risk pregnancies?
The current evidence was not of high quality and, therefore, the results should be interpreted with some caution. Women with hypertensive disorders and with small-for-date foetuses are obvious candidates for umbilical artery Doppler; the role of umbilical artery Doppler in other risk groups, including women post term, with diabetes or with uncomplicated dichorionic twin pregnancy remains unclear.
Abnormal blood flow patterns in foetal circulation detected by Doppler ultrasound may indicate poor foetal prognosis. It is also possible false positive Doppler ultrasound findings could encourage inappropriate early delivery.