GESTATIONAL AGE DETERMINATION BY

CROWN RUMP LENGTH

 

CRL(mm)

GA(wks)

CRL(mm)

GA(wks)

CRL(mm)

GA(wks)

CRL(mm)

GA(wks

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

6.0
6.2
6.4
6.6
6.8
7.0
7.2
7.4
7.5
7.7
7.8
8.0
8.1
8.3
8.4
8.5
8.7
8.8
8.9

24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

9.0
9.1
9.3
9.4
9.5
9.6
9.7
9.8
9.9
10.0
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.8

43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61

10.9
11.0
11.1
11.2
11.3
11.4
11.4
11.5
11.6
11.7
11.8
11.8
11.9
12.0
12.1
12.2
12.2
12.3
12.4

62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

12.4
12.5
12.6
12.7
12.7
12.8
12.9
12.9
13.0
13.1
13.2
13.2
13.3
13.4
13.4
13.5
13.5
13.6
13.7



 

 

REFERENCES
  1. Robinson HP, Fleming JEE. A critical evaluation of sonar "crown-rump length" measurements. BR J Obstet Gynecol 1975;82:702-710.