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OB Tables
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LOGIQ 7/LOGIQ 7 Pro Advanced Reference Manual
Direction 5116269-100 Rev. 2
Table 3-47: FL/HC Ratio: Hadlock, J Ultrasound Med 1984, 3: 439-442 (Fetal Growth)
Unit: GA (Weeks)
GA
Min
Max
GA
Min
Max
GA
Min
Max
<15
15
16
17
18
19
20
21
22
23
n/a
15.3
13.3
14.6
15.8
16.1
16.8
15.9
18.4
19.2
——
17.1
16.5
17.6
18.0
18.3
19.8
20.3
20.2
20.8
24
25
26
27
28
29
30
31
32
33
18.7
18.7
18.6
18.6
18.8
19.6
19.2
19.3
19.1
19.9
20.9
20.3
20.4
20.4
20.6
20.8
21.4
21.3
21.3
21.5
34
35
36
37
38
39
40
41
42
>42
19.4
20.1
20.1
20.8
20.9
20.6
20.7
21.6
20.1
n/a
21.8
22.3
22.1
22.6
22.7
23.4
22.5
23.2
23.9
n/a
Table 3-48: FL/AC Ratio: Hadlock (Fetal Growth)
Unit: Age (Weeks)
Age
Min (Index)
Max (Index)
21
42
20
20
24
24