Characteristics

Median (range) or n (%)

Maternal age

31 (22 - 39)

Age ≥ 35

22 (21.8%)

Gestational age (weeks + days)

12 + 3 (11 + 2 to 13 + 5)

Crown rump length

62.3 (46.3 - 80.3)

CRL (45 - 64 mm)

68 (67.3%)

CRL (65 - 82 mm)

33 (32.7%)

Nuchal translucency

1.7 (0.93 - 2.84)

Body mass index ≥ 25

11 (10.9%)

Gravida

1

43 (42.6%)

2

43 (42.6%)

3

15 (14.9%)

Parity

0

59 (58.4%)

1

39 (38.6%)

2

3 (3.0%)

Unfavourable fetal position

6 (5.9%)