Hi All, My wife is 21 week
pregnant, and we did anomaly scan at 18 weeks and the nasal bone length was 4.88 mm and in the double marker report says "screening test has probability is 1:4114 for Down syndrome. Screening Test is Negative.'' And RISK IS LOW.
At 21 week we did another anomaly and the nasal bone length was 3.2 mm and impression is small in size. Does all these means there is definite chance of Down Syndrome and it was suggested to do NIPT .
Please suggest.