Negrini, Rômulo Assessment of placental blood flow between 22 and 34 weeks of gestation by 3D-sonography power Doppler vascular indices. [electronic resource] - Archives of gynecology and obstetrics Jul 2011 - 53-7 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1432-0711 Standard No.: 10.1007/s00404-010-1595-x doi Subjects--Topical Terms: Cross-Sectional StudiesFemaleHumansImaging, Three-DimensionalPlacenta--physiologyPlacental CirculationPregnancy--physiologyPregnancy Trimester, SecondPregnancy Trimester, ThirdUltrasonography, DopplerUltrasonography, Prenatal