Table 12. Growth chart for fetal femur length/head circumference ratio.
Gestational Age (Weeks) | Femur Length/Head Circumference Ratio by Percentile | ||||||||
---|---|---|---|---|---|---|---|---|---|
2.5 | 5 | 10 | 25 | 50 | 75 | 90 | 95 | 97.5 | |
14 | 0.50 | 0.52 | 0.53 | 0.54 | 0.56 | 0.57 | 0.59 | 0.59 | 0.60 |
15 | 0.54 | 0.55 | 0.56 | 0.57 | 0.59 | 0.60 | 0.61 | 0.62 | 0.62 |
16 | 0.57 | 0.58 | 0.59 | 0.60 | 0.61 | 0.62 | 0.63 | 0.64 | 0.64 |
17 | 0.60 | 0.60 | 0.61 | 0.62 | 0.63 | 0.64 | 0.65 | 0.65 | 0.66 |
18 | 0.62 | 0.62 | 0.63 | 0.64 | 0.65 | 0.66 | 0.66 | 0.67 | 0.67 |
19 | 0.64 | 0.64 | 0.65 | 0.65 | 0.66 | 0.67 | 0.68 | 0.68 | 0.68 |
20 | 0.65 | 0.66 | 0.66 | 0.67 | 0.67 | 0.68 | 0.69 | 0.69 | 0.69 |
21 | 0.66 | 0.67 | 0.67 | 0.68 | 0.68 | 0.69 | 0.69 | 0.70 | 0.70 |
22 | 0.67 | 0.67 | 0.68 | 0.68 | 0.69 | 0.69 | 0.70 | 0.70 | 0.71 |
23 | 0.68 | 0.68 | 0.68 | 0.69 | 0.69 | 0.70 | 0.70 | 0.71 | 0.71 |
24 | 0.68 | 0.69 | 0.69 | 0.69 | 0.70 | 0.70 | 0.71 | 0.71 | 0.71 |
25 | 0.69 | 0.69 | 0.69 | 0.70 | 0.70 | 0.71 | 0.71 | 0.71 | 0.72 |
26 | 0.69 | 0.69 | 0.69 | 0.70 | 0.70 | 0.71 | 0.71 | 0.72 | 0.72 |
27 | 0.69 | 0.69 | 0.70 | 0.70 | 0.71 | 0.71 | 0.72 | 0.72 | 0.72 |
28 | 0.69 | 0.70 | 0.70 | 0.70 | 0.71 | 0.71 | 0.72 | 0.72 | 0.72 |
29 | 0.70 | 0.70 | 0.70 | 0.71 | 0.71 | 0.72 | 0.72 | 0.72 | 0.73 |
30 | 0.70 | 0.70 | 0.70 | 0.71 | 0.71 | 0.72 | 0.72 | 0.73 | 0.73 |
31 | 0.70 | 0.70 | 0.71 | 0.71 | 0.72 | 0.72 | 0.73 | 0.73 | 0.73 |
32 | 0.70 | 0.71 | 0.71 | 0.72 | 0.72 | 0.73 | 0.73 | 0.73 | 0.74 |
33 | 0.71 | 0.71 | 0.71 | 0.72 | 0.72 | 0.73 | 0.73 | 0.74 | 0.74 |
34 | 0.71 | 0.71 | 0.72 | 0.72 | 0.73 | 0.73 | 0.74 | 0.74 | 0.74 |
35 | 0.71 | 0.72 | 0.72 | 0.73 | 0.73 | 0.74 | 0.74 | 0.74 | 0.75 |
36 | 0.72 | 0.72 | 0.72 | 0.73 | 0.73 | 0.74 | 0.74 | 0.75 | 0.75 |
37 | 0.72 | 0.72 | 0.73 | 0.73 | 0.74 | 0.74 | 0.74 | 0.75 | 0.75 |
38 | 0.72 | 0.72 | 0.73 | 0.73 | 0.74 | 0.74 | 0.75 | 0.75 | 0.75 |
39 | 0.72 | 0.72 | 0.73 | 0.73 | 0.74 | 0.74 | 0.75 | 0.75 | 0.75 |
40 | 0.71 | 0.72 | 0.72 | 0.73 | 0.73 | 0.74 | 0.75 | 0.75 | 0.75 |