NT is significant thick Risk for trisomyis high Generally in routine screening these findings are not seen Amniocentesis gives confirmation Option is prenatal tests frm mothers blood sample ( non invasive)

Age is an important factor in here .

NT scan + Dual marker test + Maternal age = 91% efficacy with 5% False positive test ( Screening test ) NIPT = 99% efficacy ( Screening test ) Amniocentesis = 100% efficacy ( Diagnostic test ) Do not take any adverse decision on the bases on NT scan and Dual marker as they r just screening tests. Do Amniocentesis for final decision.