Fetal Medicine Foundation

The Diencephalon/Falx Ratio: A Novel Mid‐Sagittal Marker for First‐Trimester Neurosonography

ABSTRACT Objectives To establish normative reference ranges for diencephalon diameter, falx cerebri length, and the diencephalon/falx (D/F) ratio between 11 + 6 and 13 + 6 weeks of gestation and to evaluate their relationship with crown–rump length (CRL). Methods This prospective...