IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-11-31878 Original Research Paper Assessment of the value of Ductus Venosus doppler study in the detection of congenital malformations in pregnancies with normal Nuchal Translucency and nasal bone Rabiya Baseri Nelofar Dr. November 2020 9 11 01 02