The NT scan and the double marker test both are screening tests .the predictability of both tests are different.but the positive predictability of both the tests as combined screening protocols are much better ( almost certain).so better to do both

Both together is best

Nt scan along with double marker together has better specificity... So if u can get double marker done along with by scan

When you do both it is called combined test More informative Do both

Hi. NT SCAN and double marker are both different type of tests. NT scan will test you about any deformity your baby might have by looking for physical appearance defects. And double marker will test the blood of the mother to look for the defect. Both tests together will give you a much better result than either of them alone.

Yes double marker and NT will give more information of how baby is and if there is any problem with the baby. It's better to do both NT and double marker