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Table 2 Clinical details of the 5 cases with fetal trisomies 18 and 21

From: Performance of non-invasive prenatal testing for trisomies 21 and 18 in twin pregnancies

Placentation Case Maternal age Gestational age Conception Fetal fraction BMI NIPT Result Karyotyping
DCDA Case 1 31 19 ART 9 25 T18 Normal/T18
Case 2 37 18 ART 7.5 22 T21 Normal/T21
Case 3 35 16 ART 21.2 23 T21 Normal/T21
Case 4 36 16 ART 30.6 22 T21 Normal/T21
MCDA Case 5 37 16 NP 6.1 27 T21 Normal/T21
  1. DCDA Dichorionic diamniotic, MCDA Monochorionic diamniotic, ART Artificial reproductive technology, NP Natural pregnancy