Table 1.

Characteristics of 251 pregnant women with abnormal findings at sonographic examination who had non‐invasive prenatal testing (NIPT) as first‐tier genetic test

Characteristic	Value
Age (years)	31 (17–44)
Maternal weight at NIPT (kg)	69 (44–123)
Singleton pregnancy	230 (91.6)
Multiple pregnancy	21 (8.4)
Primigravid	94 (37.5)
Multigravid	157 (62.5)
Nulliparous	119 (47.4)
Parous	132 (52.6)
GA at NIPT (weeks)*	20 (10–34)

Data are given as median (range) or n (%).

^*Gestational age (GA) had bimodal distribution, with peaks at 12–13 weeks and at 20–21 weeks.