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OB Tables
3
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20
LOGIQ 7/LOGIQ 7 Pro Advanced Reference Manual
Direction 5116269-100 Rev. 2
Hadlock
Table 3-36: AC: Hadlock, Radiology 1984, Vol. 152:497 (Fetal Age)
Unit: meas (mm); mean(Week); SD (Week)
Table type = SD, Table range = 2SD, Graph range = 2SD
Meas
Mean
SD
Meas
Mean
SD
Meas
Mean
SD
Meas
Mean
SD
<50
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
123
124
125
130
n/a
12.0
12.4
12.8
13.2
13.6
14.0
14.4
14.8
15.2
15.6
16.0
16.4
16.9
17.3
17.7
17.9
18.0
18.1
18.5
——
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
1.66
2.06
2.06
2.06
135
140
145
150
155
160
165
170
175
180
185
190
192
193
195
200
205
210
215
220
19.0
19.4
19.8
20.2
20.7
21.1
21.5
22.0
22.4
22.9
23.3
23.7
23.9
24.0
24.2
24.6
25.1
25.5
26.0
26.4
2.06
2.06
2.06
2.06
2.06
2.06
2.06
2.06
2.06
2.06
2.06
2.06
2.06
2.18
2.18
2.18
2.18
2.18
2.18
2.18
225
230
235
240
245
250
255
258
259
260
265
270
275
280
285
290
295
300
305
310
26.9
27.4
27.8
28.3
28.7
29.2
29.7
30.0
30.1
30.2
30.6
31.1
31.6
32.0
32.5
33.0
33.5
34.0
34.5
34.9
2.18
2.18
2.18
2.18
2.18
2.18
2.18
2.96
2.96
2.96
2.96
2.96
2.96
2.96
2.96
2.96
2.96
2.96
2.96
2.96
315
320
321
325
330
335
340
345
350
355
360
365
370
375
380
385
>385
35.4
35.9
36.0
36.4
36.9
37.4
37.9
38.4
38.9
39.4
39.9
40.4
40.9
41.4
42.0
42.5
n/a
2.96
2.96
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
3.04
——
Table 3-37: AC: Hadlock, AJR; 139: 367-370;
1982
(Fetal Age)
Unit: AC (mm); Age (Days); SD (Days)
AC
Age
SD
AC
Age
SD
AC
Age
SD
AC
Age
SD
<47
47
53
60
67
74
80
87
93
100
106
113
119
126
132
n/a
84
87
91
94
98
101
105
106
112
115
119
122
126
129
——
13
13
13
13
13
13
13
13
13
13
13
13
13
14
138
144
151
157
163
174
180
186
192
197
203
208
214
219
225
133
136
140
143
147
154
157
161
164
168
171
175
178
182
185
14
14
14
14
14
14
14
14
14
14
15
15
15
15
15
230
235
241
246
251
256
261
266
271
276
281
286
291
296
300
189
192
196
199
203
206
210
213
217
220
224
227
231
234
238
15
15
15
15
15
15
15
21
21
21
21
21
21
21
21
305
310
314
319
323
328
332
337
341
344
349
353
>353
241
245
248
252
255
259
262
266
269
273
276
280
n/a
21
21
21
21
18
18
18
18
18
18
18
18
——