The nasal bone is another of the ultrasound markers that can be used to calculate the risk index for chromosomopathies in triple screening.
Specifically, the nasal bone should be present in the 12-week pregnancy ultrasound; since the absence of nasal bone, together with increased nuchal translucency, is indicative of Down syndrome.
Other ultrasound markers are the ductus venosus (Doppler measurement performed at the insertion of the fetal umbilical cord), tricuspid regurgitation (altered flow in the tricuspid valve) and the fronto-manidubular angle (inclination between the frontal bone and the mandible).
Read the full article on: Nuchal translucency and combined first trimester screening ( 53).
Bachelor's Degree in Biotechnology from the Technical University of Valencia (UPV). Biotechnology Degree from the National University of Ireland en Galway (NUIG) and embryologist specializing in Assisted Reproduction, with a Master's Degree in Biotechnology of Human Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI)