The ‘three‐dot’ sign: sonographic marker for first‐trimester screening of cleft of the fetal secondary palate

The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions. Videoclip S1 How to acquire the ‘three-dot’ sign. Figure S1 Three-dimensional ultrasound imaging of the fetal face, showing the utility of the retronasal triangle and the ‘three-dot’ sign in evaluating cleft extension into secondary palate. Figure S2 Two-dimensional ultrasound images demonstrating a lateralized paramedian defect of the upper lip with complete bilateral/complex extension into the secondary palate, at 13 weeks' gestation. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.