If nasal bone is absent due to trisomy 21, will that fetus suffer from mental retardation? Can mental retardation or other such problems detected by ultrasound at 30 weeks?
Welcome to icliniq.com.
Absent nasal bone is a soft tissue in ultrasound to diagnose Trisomy 21. Absent fetal nasal bone is one of the strongest soft markers in the second-trimester ultrasound screening. Detailed prenatal diagnosis is advisable to rule out abnormal karyotype when absent nasal bone is associated with other ultrasound markers of fetal aneuploidy or structural abnormality. Nearly two-thirds of 15-22-week-old fetuses with Down's syndrome lack a nasal bone according to fetal-medicine specialist.
For normal fetuses, the figure is 1%. This makes it unlikely that the test would wrongly diagnose Down's syndrome. Mental retardation cannot be diagnosed in 30 weeks scan. But if only an absent nasal bone is there with no other structural abnormality and NIPT (noninvasive prenatal testing) or amniocentesis is normal then please understand that the risk of isolated NB absence compared with non-isolated NB absence is much lower.
Was this answer helpful?|
Same symptoms doesn’t mean you have the same problem. Consult a doctor now!
Depression is basically an affective disorder affecting the emotional tone of an individual ... Read fullWhat is amniocentesis?
.. information you have given, the risk of having a baby with chromosomal problem that is trisomy 21 or Down's syndrome is 1:86. I believe you would have received detailed counseling about this condition prior to and after going through the screening... Read fullIs this fetal ultrasound report of my wife a normal one?
.. your query and understand your concern. The changes are normal as the baby grows bigger. You do not have a reason to be worried too much. For further doubts consult a fetal medicine physician online --> .. ... Read full
Ask your health query to a doctor online?Ask an Obstetrician & Gynaecologist Now