Analysis of characteristic features in ultrasound diagnosis of fetal limb body wall complex during 11-13+6 weeks

Table 2 Fetal nuchal translucency measurement result

No.	NT	Nasal bone visible	Ductus venosus
1	2.0	Yes	Visible, no reverse a-wave
2	Unmeasurable	No	Invisible
3	Unmeasurable	No	Visible, no reverse a-wave
4	Unmeasurable	Yes	Invisible
5	Unmeasurable	No	Invisible
6	2.3	Yes	Visible, no reverse a-wave
7	3.8	Yes	Invisible
8	Unmeasurable	No	Visible, no reverse a-wave
9	Unmeasurable	Yes	Invisible
10	1.3	Yes	Visible, no reverse a-wave
11	1.8	Yes	Invisible
12	3.4	Yes	Visible, no reverse a-wave
13	1.1	Yes	Visible, no reverse a-wave
14	4.7	Yes	Visible, no reverse a-wave
15	2.8	Yes	Visible, no reverse a-wave
16	Unmeasurable	No	Invisible
17	3.6	Yes	Visible, no reverse a-wave
18	2.4	Yes	Visible, no reverse a-wave

NT: Nuchal translucency.