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NT scan is normal..
Hi. My NT scan is normal with NT of 1.4. But dual marker is showing 1:634 for t21.. I did this two test in difference of 4 days. Also for dual marker the sample was collected on 23rd noon and sample was tested on 24th morning. Can that affect the readings in dual marker?
Should I go for NIPT?
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Hi
Nt scan is ideally done between 11 weeks to 13 weeks 6 days and when crl falls between 33-80mm
Dual marker ideally done between 10- 14 weeks
nt of 1.4mm generally speaking is within normal limit and that again depends on gestational age.
Time difference between sample collection tested has no significance
4 days of gap has no significance if testing was done before 14 weeks
T21 risk ratio mentioned here is negative for screening.
NIPT in your case is not advisable
Usual indications for NIPT are following
if dual marker screening is positive
Soft markers showing increased risk for aneuploidies
Generally age more than 35
Previous history of anomalous baby
Known chromosomal translocation in parents
If you are anxious and wanting to get screened, there is no harm and can very well go ahead for NIPT, it’s a blood test can be done anytime after 10 weeks
Next Steps
Stop worrying and continue to consult obstetricians for further queries
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Connect please
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Dr. Vijaya Gupta
Gynecologist
21 yrs exp
Chandigarh
Double market test should be done before 13 weeks and 5 days
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Dr. Banka Soujanya
Gynecologist/Obstetrician
11 yrs exp
Hyderabad
Better to go with NIPT
for detail analysis
Test values doesn’t depend on Time of collection
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Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.