Table 2.
Percentiles of fetal superior vena cava diameter (cm) at 20–40 weeks of gestational age (GA).
Percentile | ||||||||
---|---|---|---|---|---|---|---|---|
GA (weeks) | n | 2.5th | 5th | 10th | 50th | 90th | 95th | 97.5th |
20 | 20 | 0.13 | 0.14 | 0.15 | 0.19 | 0.24 | 0.26 | 0.27 |
21 | 32 | 0.14 | 0.15 | 0.16 | 0.21 | 0.26 | 0.28 | 0.29 |
22 | 29 | 0.15 | 0.16 | 0.18 | 0.23 | 0.28 | 0.30 | 0.31 |
23 | 32 | 0.17 | 0.18 | 0.19 | 0.24 | 0.30 | 0.32 | 0.33 |
24 | 17 | 0.18 | 0.19 | 0.21 | 0.26 | 0.32 | 0.34 | 0.35 |
25 | 28 | 0.19 | 0.21 | 0.22 | 0.28 | 0.34 | 0.36 | 0.38 |
26 | 28 | 0.21 | 0.22 | 0.23 | 0.29 | 0.36 | 0.38 | 0.40 |
27 | 27 | 0.22 | 0.23 | 0.25 | 0.31 | 0.38 | 0.40 | 0.42 |
28 | 27 | 0.23 | 0.25 | 0.26 | 0.33 | 0.40 | 0.42 | 0.44 |
29 | 21 | 0.25 | 0.26 | 0.28 | 0.35 | 0.42 | 0.44 | 0.46 |
30 | 34 | 0.26 | 0.27 | 0.29 | 0.36 | 0.44 | 0.46 | 0.48 |
31 | 25 | 0.27 | 0.29 | 0.31 | 0.38 | 0.46 | 0.48 | 0.50 |
32 | 18 | 0.28 | 0.30 | 0.32 | 0.40 | 0.48 | 0.50 | 0.53 |
33 | 24 | 0.30 | 0.31 | 0.33 | 0.41 | 0.50 | 0.52 | 0.55 |
34 | 25 | 0.31 | 0.33 | 0.35 | 0.43 | 0.52 | 0.54 | 0.57 |
35 | 25 | 0.32 | 0.34 | 0.36 | 0.44 | 0.54 | 0.56 | 0.59 |
36 | 18 | 0.33 | 0.35 | 0.37 | 0.46 | 0.55 | 0.58 | 0.61 |
37 | 19 | 0.34 | 0.36 | 0.39 | 0.47 | 0.57 | 0.60 | 0.63 |
38 | 24 | 0.35 | 0.37 | 0.40 | 0.49 | 0.59 | 0.62 | 0.65 |
39 | 17 | 0.36 | 0.38 | 0.41 | 0.50 | 0.61 | 0.64 | 0.66 |
40 | 2 | 0.37 | 0.40 | 0.42 | 0.52 | 0.62 | 0.65 | 0.68 |