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. 2017 Jan 24;14(1):e1002220. doi: 10.1371/journal.pmed.1002220

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