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Table 3 Options offered for Down syndrome screening in the first trimester

From: Prenatal screening in the era of non-invasive prenatal testing: a Nationwide cross-sectional survey of obstetrician knowledge, attitudes and clinical practice

  Singleton Foetus
N (%)
DCDA Twins
N (%)
MCDA Twins
N (%)
Nuchal translucency (NT) alone 7 (7.4) 16 (17) 13 (13.8)
First trimester screening (FTS) comprising NT, PAPPA, bHCG) 74 (78.7) 65 (69.1) 64 (68.1)
NIPT 43 (45.7) 16 (17) 29 (30.9)
NT in combination with NIPT 25 (26.6) 15 (16) 13 (13.8)
FTS in combination with NIPT 33 (35.1) 11 (11.7) 20 (21.3)
Others Invasive testing: 2 (2.1)
Two-step contingency testing 1 (1.7)
Invasive testing: 2 (2.1) Invasive testing: 2 (2.1)