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)

Objectives

Objectives To evaluate the additional value of threedimensional (3D) multiplanar ultrasound in the examination of the fetal profile. Methods

Although large prospective studies are needed, the FP line may be a useful tool to detect second trimester profile anomalies such as retrognathia, sloping forehead and frontal bossing with the possibility of quantifying the latter.

Objectives To assess the feasibility of nasal bone length (NBL), prenasal thickness (PT) and frontomaxillary facial (FMF)