Dr Vandan H KumarFather of a 7 yr 6 m old boy1 Year agoA. it would be better to clear the doubts with your doctor
in your case a medical examination is required for proper diagnosis and treatment.
difficult to tell without examination whether it is normal or not.
advisable to remain in contact with your doctor for proper guidance and treatment
POOJA KOTHARIMom of a 8 yr 7 m old boy1 Year agoA. When the fetus is 20 weeks old, the length of the nasal bone is 4.50mm or more is normal, and if it is less than 3.50mm at 22 weeks of pregnancy, the risk of the baby having Down syndrome is very high.
Post Answer