Nasal Bone Length
Guis F, Ville Y, Vincent Y
et.al.
Ultrasound evaluation of the length
of the
fetal nasal bones throughout gestation.
Ultrasound Obstet Gynecol
1995;5:304-307
|
GA (wks) |
-2SD |
Mean |
+2SD |
|
14 |
3.321 |
4.183 |
5.045 |
|
16 |
3.089 |
5.2136 |
7.337 |
|
18 |
5 |
6.308 |
7.616 |
|
20 |
5.715 |
7.621 |
9.527 |
|
22 |
6.035 |
8.239 |
10.443 |
|
24 |
6.762 |
9.362 |
11.962 |
|
26 |
7.19 |
9.744 |
12.298 |
|
28 |
7.803 |
10.721 |
13.639 |
|
30 |
8.322 |
11.348 |
14.374 |
|
32 |
7.99 |
11.58 |
15.17 |
|
34 |
7.541 |
12.285 |
17.029 |