From: Fetal age assessment based on 2nd trimester ultrasound in Africa and the effect of ethnicity
Centiles | ||||||
---|---|---|---|---|---|---|
50th | 2.5th | 97.5th | ||||
FL (mm) | weeks | days | Weeks | days | weeks | days |
11 | 11 | 5 | 12 | 0 | 13 | 6 |
12 | 12 | 1 | 12 | 4 | 14 | 3 |
13 | 12 | 4 | 13 | 0 | 14 | 6 |
14 | 13 | 0 | 13 | 3 | 15 | 2 |
15 | 13 | 3 | 13 | 5 | 15 | 5 |
16 | 13 | 5 | 14 | 1 | 16 | 0 |
17 | 14 | 1 | 14 | 4 | 16 | 3 |
18 | 14 | 4 | 14 | 6 | 16 | 6 |
19 | 14 | 6 | 15 | 2 | 17 | 1 |
20 | 15 | 2 | 15 | 4 | 17 | 4 |
21 | 15 | 4 | 16 | 0 | 17 | 6 |
22 | 15 | 6 | 16 | 2 | 18 | 2 |
23 | 16 | 2 | 16 | 5 | 18 | 4 |
24 | 16 | 4 | 17 | 0 | 19 | 0 |
25 | 16 | 6 | 17 | 2 | 19 | 2 |
26 | 17 | 1 | 17 | 4 | 19 | 4 |
27 | 17 | 4 | 18 | 0 | 20 | 0 |
28 | 17 | 6 | 18 | 2 | 20 | 2 |
29 | 18 | 1 | 18 | 4 | 20 | 4 |
30 | 18 | 3 | 18 | 6 | 20 | 6 |
31 | 18 | 5 | 19 | 1 | 21 | 2 |
32 | 19 | 0 | 19 | 3 | 21 | 4 |
33 | 19 | 2 | 19 | 5 | 21 | 6 |
34 | 19 | 4 | 20 | 1 | 22 | 1 |
35 | 19 | 6 | 20 | 3 | 22 | 3 |
36 | 20 | 2 | 20 | 5 | 22 | 5 |
37 | 20 | 4 | 21 | 0 | 23 | 1 |
38 | 20 | 6 | 21 | 2 | 23 | 3 |
39 | 21 | 1 | 21 | 4 | 23 | 5 |
40 | 21 | 3 | 21 | 6 | 24 | 0 |