Single most important feature to diagnose fetal aneuploidy:
Ans: (a) Increased nuchal translucencyRef: Current Progress in Obstetrics and Gynecology, John Stud, Volume Page 17Ultrasound markers of fetal aneuploidy:Nuchal translucency is the single most powerful tool. More than 3 mm needs evaluationAbsence of nasal boneAbsence or reversal of flow in the ductus venosus on DopplerTricuspid regurgitationIncrease in frontomaxillary angle more than 85 deg
Increased nuchal translucency
Absent nasal bone
Cystic hygroma
Abnormal ductus venosus flow
Physiology & Histology