Objectives To systematically review the diagnostic accuracy of second-trimester transabdominal ultrasound in detecting orofacial clefts in low-and high-risk populations and to compare two-dimensional (2D) with three-dimensional (3D) ultrasound techniques.Methods MEDLINE and EMBASE were searched for articles published in English, Dutch, French or German using the keywords 'cleft' and 'ultrasound' or 'screening' or 'sonogram' and 'prenatal' or 'antenatal' or 'fetus

Objectives

Cleft lip with or without cleft palate (CP) is one of the most common congenital malformations. Ultrasonographers involved in the routine 20-wk ultrasound screening could encounter these malformations. The face and palate develop in a very characteristic way. For ultrasonographers involved in screening these patients it is crucial to have a thorough understanding of the embryology of the face. This could help them to make a more accurate diagnosis and save time during the ultrasound. Subsequently, the current postnatal classification will be discussed to facilitate the communication with the CP teams.

Objectives To study the ratio of prenasal thickness (PT) to nasal bone length (NBL) in normal and trisomy-21 fetuses in the second and third trimesters of pregnancy.Methods The PT and NBL were measured retrospectively in 106 normal fetuses (in three-dimensional (3D)