A simple, safe and accurate method of localizing placenta by ultrasound is described. The accuracy of this technique is verified by anatomical comparison with the standara procedures. A method is suggested for diagrammatically charting the data collected on Doppler placentography. The study revealed that the ultrasonic Dopplei technique has a uniform reliability of 88.5% in experienced hands. The technique has specific advantages, particularly its simplicity and reproducibility which is superior to most available methods that are more sophisticated and hazardous.