PubMed · 1991 · 48 citations · 0 references
MedicineGynecologyObstetricsMaternal-fetal MedicinePrenatal DiagnosisReproductive MedicinePlacental AssessmentPlacental BiologyPlacental PathologyPlacental PhysiologyPlacental UltrasonographyPlacental Anatomy AssessmentPlacental GradingPlacental Gross ExaminationPlacental Location AssessmentPlacental Tissue Characterization