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An Evaluation of Placental Localization using the Doppler Ultrasound in Singapore

Summary: The Doppler ultrasound was used to localise the placental site in 107 patients, including 21 with placenta praevia. Although the accuracy obtained was 82%, the high percentage of false negatives (10 of 21) made it unacceptable as a guide for clinical management. Inability to diagnose posterior placenta praevia may be an inherent disadvantage of this method of placental localization.