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Objectives
To evaluate the performance of the maxilla in the axial view in detection of orofacial clefts (OC) compared with the retronasal triangle (RNT) in the coronal view and palatine line in the sagittal view at the early stage of gestation.
Methods
A total of 2982 fetuses (including 315 twins) were enrolled for the first‐trimester screening in this prospective study. The maxilla in the axial...