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. 2013 Dec 7;13:151. doi: 10.1186/1471-2288-13-151

Table 2.

Estimated gestational age in relation to crown-rump length (CRL) measurements for the original equation reported by Verburg and a model fitted to the simulated data (Approach 1)

 
 Verburg’s original equation
 Approach 1
  
Estimated GA (weeks)
 Estimated GA (weeks)
 Difference (days)
CRL (mm) 3 rd centile Median 97 th centile 3 rd centile Median 97 th centile 3 rd centile Median 97 th centile
10
 6.88
 7.50
 8.18
 6.85
 8.18
 8.22
 0.21
 -4.76
 -0.28
15
 7.63
 8.31
 9.06
 7.60
 8.53
 9.09
 0.21
 -1.54
 -0.21
20
 8.22
 8.96
 9.77
 8.20
 9.02
 9.80
 0.14
 -0.42
 -0.21
25
 8.73
 9.52
 10.38
 8.72
 9.51
 10.40
 0.07
 0.07
 -0.14
30
 9.19
 10.02
 10.92
 9.18
 9.99
 10.93
 0.07
 0.21
 -0.07
35
 9.60
 10.47
 11.41
 9.60
 10.45
 11.41
 0.00
 0.14
 0.00
40
 9.99
 10.89
 11.87
 10.00
 10.88
 11.86
 -0.07
 0.07
 0.07
45
 10.36
 11.29
 12.31
 10.37
 11.30
 12.29
 -0.07
 -0.07
 0.14
50
 10.70
 11.67
 12.72
 10.73
 11.69
 12.69
 -0.21
 -0.14
 0.21
55
 11.04
 12.03
 13.12
 11.08
 12.07
 13.07
 -0.28
 -0.28
 0.35
60
 11.36
 12.39
 13.50
 11.41
 12.43
 13.44
 -0.35
 -0.28
 0.42
65
 11.67
 12.73
 13.87
 11.74
 12.77
 13.80
 -0.49
 -0.28
 0.49
70
 11.98
 13.06
 14.24
 12.05
 13.11
 14.15
 -0.49
 -0.35
 0.63
75
 12.28
 13.39
 14.59
 12.37
 13.43
 14.49
 -0.63
 -0.28
 0.70
80
 12.57
 13.71
 14.94
 12.67
 13.74
 14.82
 -0.70
 -0.21
 0.84
85
 12.86
 14.02
 15.28
 12.98
 14.04
 15.15
 -0.84
 -0.14
 0.91
90
 13.15
 14.33
 15.62
 13.27
 14.34
 15.47
 -0.84
 -0.07
 1.05
95
 13.43
 14.64
 15.96
 13.57
 14.62
 15.79
 -0.98
 0.14
 1.19
100 13.71 14.94 16.29 13.86 14.90 16.10 -1.05 0.28 1.33