
OB Tables
3
-
12
LOGIQ 7/LOGIQ 7 Pro Advanced Reference Manual
Direction 5116269-100 Rev. 2
Table 3-24: FL:Altmann D.G.;Chitty L.S. “New charts for ultrasound dating of
pregnancy” Ultrasound in Obstetrics and Gynecology Vol. 10:174-191. 1997
Unit: FL(cm); GA(weeks+days)
FL
GA
FL
GA
5%
50%
95%
5%
50%
95%
1.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.00
2.10
2.20
2.30
2.40
2.50
2.60
2.70
2.80
2.90
3.00
3.10
3.20
3.30
3.40
3.50
3.60
3.70
3.80
12w1d
12w3d
12w5d
13w0d
13w1d
13w3d
13w5d
14w0d
14w2d
14w4d
14w6d
15w1d
15w3d
15w5d
16w0d
16w2d
16w4d
16w6d
17w1d
17w4d
17w6d
18w1d
18w3d
18w5d
19w1d
19w3d
19w5d
20w1d
20w3d
13w0d
13w2d
13w4d
13w6d
14w1d
14w3d
14w5d
15w0d
15w2d
15w4d
15w5d
16w0d
16w2d
16w4d
16w6d
17w2d
17w4d
17w6d
18w2d
18w4d
18w6d
19w2d
19w4d
19w6d
20w0d
20w2d
20w5d
21w0d
21w3d
13w6d
14w1d
14w4d
14w6d
15w1d
15w3d
15w6d
16w1d
16w3d
16w6d
17w1d
17w3d
17w6d
18w1d
18w4d
18w6d
19w2d
19w5d
20w0d
20w3d
20w5d
21w1d
21w4d
22w0d
22w2d
22w5d
23w1d
23w4d
24w0d
3.90
4.00
4.10
4.20
4.30
4.40
4.50
4.60
4.70
4.80
4.90
5.00
5.10
5.20
5.30
5.40
5.50
5.60
5.70
5.80
5.90
6.00
6.10
6.20
6.30
6.40
6.50
6.60
6.70
20w5d
21w1d
21w3d
21w6d
22w1d
22w4d
22w6d
23w2d
23w4d
24w0d
24w3d
24w5d
25w1d
25w4d
26w0d
26w2d
26w5d
27w1d
27w4d
28w0d
28w3d
28w6d
29w2d
29w5d
30w1d
30w4d
31w0d
31w3d
32w0d
22w4d
22w6d
23w2d
23w5d
24w1d
24w3d
24w6d
25w2d
25w5d
26w1d
26w4d
27w0d
27w3d
27w6d
28w2d
28w5d
29w2d
29w5d
30w1d
30w4d
31w1d
31w4d
32w1d
32w4d
33w1d
33w4d
34w1d
34w4d
35w1d
24w3d
24w6d
25w2d
25w5d
26w1d
26w4d
27w1d
27w4d
28w0d
28w3d
29w0d
29w3d
30w0d
30w3d
31w0d
31w3d
32w0d
32w3d
33w0d
33w4d
34w1d
34w4d
35w1d
35w5d
36w2d
36w6d
37w3d
38w0d
38w5d