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Table 2 The mean facial ultrasound markers of the euploid fetuses in our study during the second trimester

From: Utility of fetal facial markers on a second trimester genetic sonogram in screening for Down syndrome in a high-risk Thai population

GA (Weeks)

PT (mm)

NBL (mm)

PT/NBL

NBL/PT

14

1.83

3.86

0.48

2.27

15

2.17

4.57

0.47

2.21

16

2.47

4.97

0.5

2.11

17

2.71

5.36

0.51

2.06

18

2.88

5.91

0.49

2.14

19

3.22

6.06

0.53

1.93

20

3.49

6.15

0.57

1.82

21

3.6

6.38

0.56

1.83

22

3.75

6.5

0.58

1.78

  1. GA Gestational age (weeks), PT Prenasal thickness, NBL Nasal bone length
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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