Table 1 Demographic characteristic of pregnant women undergoing NIPT
From: Performance of non-invasive prenatal testing for trisomies 21 and 18 in twin pregnancies
Characteristic | DCDA(n = 337) | MCDA(n = 95) |
|---|---|---|
Maternal age (years) | ||
  < 35(n, %) | 197(58.5) | 74(77.9) |
  > =35(n, %) | 140(41.5) | 21(22.1) |
Gestational age NIPT | ||
 9-13 week(n, %) | 47(13.9) | 14(14.7) |
 14-27 week(n, %) | 278(82.5) | 72(75.9) |
  > =28 week(n, %) | 12(3.6) | 9(9.5) |
Type of pregnancy | ||
 Artificial reproductive technology | 247(73.3) | 92(96.8) |
 Natural pregnancy | 90(26.7) | 3(3.2) |