GE LOGIQ 500 Advanced Reference Manual page 340

OB Tables
AC : Hadlock
Hadlock, Radiology
1984, Vol 152:497
AC Age 2SD AC
<50 n/a ––– 230
50 12.0 1.7 235
55 12.4 1.7 240
60 12.8 1.7 245
65 13.2 1.7 250
70 13.6 1.7 255
75 14.0 1.7 258
80 14.4 1.7 259
85 14.8 1.7 260
90 15.2 1.7 265
95 15.6 1.7 270
100 16.0 1.7 275
105 16.4 1.7 280
110 16.9 1.7 285
115 17.3 1.7 290
120 17.7 1.7 295
123 17.9 1.7 300
124 18.0 2.1 305
125 18.1 2.1 310
130 18.5 2.1 315
135 19.0 2.1 320
140 19.4 2.1 321
145 19.8 2.1 325
150 20.2 2.1 330
155 20.7 2.1 335
160 21.1 2.1 340
165 21.5 2.1 345
170 22.0 2.1 350
175 22.4 2.1 355
180 22.9 2.1 360
185 23.3 2.1 365
190 23.7 2.1 370
192 23.9 2.1 375
193 24.0 2.2 380
195 24.2 2.2 385
200 24.6 2.2 >385
205 25.1 2.2
210 25.5 2.2
215 26.0 2.2
220 26.4 2.2
225 26.9 2.2
Table 7–7. AC : Hadlock
7–6
Unit : AC (mm)
Age (Week)
2SD (Week)
Age 2SD
27.4 2.2
27.8 2.2
28.3 2.2
28.7 2.2
29.2 2.2
29.7 2.2
30.0 2.2
30.1 3.0
30.2 3.0
30.6 3.0
31.1 3.0
31.6 3.0
32.0 3.0
32.5 3.0
33.0 3.0
33.5 3.0
34.0 3.0
34.5 3.0
34.9 3.0
35.4 3.0
35.9 3.0
36.0 3.1
36.4 3.1
36.9 3.1
37.4 3.1
37.9 3.1
38.4 3.1
38.9 3.1
39.4 3.1
39.9 3.1
40.4 3.1
40.9 3.1
41.4 3.1
42.0 3.1
42.5 3.1
n/a –––
BPD : Hadlock
Hadlock, Radiology
1984, Vol 152:497
BPD Age 2SD BPD Age
<14 n/a ––– 54 22.4
14 11.9 1.2 55 22.8
15 12.1 1.2 56 23.1
16 12.3 1.2 57 23.4
17 12.5 1.2 58 23.8
18 12.8 1.2 59 24.1
19 13.0 1.2 60 24.5
20 13.2 1.2 61 24.8
21 13.4 1.2 62 25.2
22 13.6 1.2 63 25.5
23 13.8 1.2 64 25.9
24 14.1 1.2 65 26.3
25 14.3 1.2 66 26.6
26 14.5 1.2 67 27.0
27 14.8 1.2 68 27.4
28 15.0 1.2 69 27.7
29 15.2 1.2 70 28.1
30 15.5 1.2 71 28.5
31 15.7 1.2 72 28.9
32 16.0 1.2 73 29.3
33 16.3 1.2 74 29.7
34 16.5 1.2 75 30.1
35 16.8 1.2 76 30.5
36 17.0 1.2 77 30.9
37 17.3 1.2 78 31.3
38 17.6 1.2 79 31.7
39 17.9 1.2 80 32.1
40 18.1 1.7 81 32.5
41 18.4 1.7 82 33.0
42 18.7 1.7 83 33.4
43 19.0 1.7 84 33.8
44 19.3 1.7 85 34.2
45 19.6 1.7 86 34.7
46 19.9 1.7 87 35.1
47 20.2 1.7 88 35.6
48 20.5 1.7 89 36.0
49 20.8 1.7 90 36.5
50 21.1 1.7 91 36.9
51 21.5 1.7 92 37.4
52 21.8 1.7 93 37.8
53 22.1 1.7 94 38.3
Table 7–8 BPD : Hadlock
Variabilty of GA estimate by BPD at term is
 2SD (6Wks)
LOGIQ 500 Advanced Reference Manual
Unit: BPD (mm)
Age (Week)
2SD (Week)
2SD BPD Age 2SD
1.7 95 38.7 3.2
1.7 96 39.2 3.2
1.7 97 39.7 3.2
1.7 98 40.2 3.2
1.7 99 40.6 3.2
2.2 100 41.1 3.2
2.2 101 41.6 3.2
2.2 102 42.1 3.2
2.2 103 42.6 3.2
2.2 >103 n/a –––
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.1
3.2
3.2
3.2
3.2
3.2
3.2
2276614–100 Rev. 0