Harding, J A Color flow Doppler--a useful instrument in the diagnosis of vasa previa. [electronic resource] - American journal of obstetrics and gynecology Nov 1990 - 1566-8 p. digital Publication Type: Case Reports; Journal Article ISSN: 0002-9378 Standard No.: 10.1016/0002-9378(90)90628-k doi Subjects--Topical Terms: Blood Vessels--diagnostic imagingFemaleHumansPlacenta--blood supplyPregnancyRegional Blood FlowUltrasonography, Prenatal--methods