Abstract
The placenta was localized in 99 women, between the 35th and 40th week of pregnancy, by both the Doppler flowmeter and the gamma camera, using 300 μCi 99 mTc as the tracer. The conclusion from each method was the same in 84 cases (85%) and different in 15 cases. In only 4 of these latter cases was the placenta located in opposite quadrants of the uterus by the two methods. According to the results obtained, use of the Doppler flowmeter is a suitable screening test.