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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes 12mm In NT?

Hi we have 12mm NT and the FISH analysis (from CVS) is normal - we do not have abnormalities in 21, X, Y, 13, or 18 chromosomes. My question is, assuming that the heart is normal, what will happen with this growth on the back of the neck of our baby? Will it desolve? What should we expect? I see many posts about 3-4mm, but we have 12...
Tue, 14 Feb 2017
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Internal Medicine Specialist,  's  Response
Dear parent, you need a follow up amniocentesis in the second trimester of pregnancy to confirm the exclusion of 13,18, 21, X and Y chromosomes. combined with a second trimester 4dimenstional ultrasound scan of the baby. if the NT decreases and the follow up amniocentesis FISH analysis came back normal then no need to worry.
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What Causes 12mm In NT?

Dear parent, you need a follow up amniocentesis in the second trimester of pregnancy to confirm the exclusion of 13,18, 21, X and Y chromosomes. combined with a second trimester 4dimenstional ultrasound scan of the baby. if the NT decreases and the follow up amniocentesis FISH analysis came back normal then no need to worry.