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Table 1 NIPT results for the Case

From: A case of placental trisomy 18 mosaicism causing a false negative NIPT result

Gestational Weeks

Unique reads/M

Fetal DNA Fraction

NIPT Z-scores

NIPT result

Chromosome21

Chromosome18

Chromosome13

15

3.25

7.80%

−0.466

1.889

1.369

Low Risk

34

3.36

16.6%

−1.491

5.500

−0.016

High Risk of T18

  1. Z scores were calculated as previously described [12] with a normal range > −3 and <3
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Molecular Cytogenetics

ISSN: 1755-8166