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Transvaginal ultrasonography at early pregnancy cannot be used alone for targeted organ ultrasonographic examination in a high-risk population

Obstetric ImagingMedical ImagingOrgan Ultrasonographic ExaminationReproductive HealthGynecologyMaternal HealthObstetricsPrenatal DiagnosisTransvaginal UltrasonographyEarly PregnancyUltrasoundPrenatal TestingMedicineIntrapartum UltrasoundRadiologyHealth Sciences