The foot length can be estimated from the gestational age assuming normal development.
Wigglesworth
|
menstrual age (end of week) |
min foot length mm |
mean foot length mm |
max foot length mm |
|---|---|---|---|
|
8.5 |
3.8 |
4.2 |
4.6 |
|
9 |
4.2 |
4.6 |
5 |
|
10 |
5 |
5.5 |
6 |
|
11 |
6 |
6.9 |
7.8 |
|
12 |
7.5 |
9.1 |
10.8 |
|
13 |
9.8 |
11.4 |
13 |
|
14 |
12.3 |
14 |
15.5 |
|
15 |
15.2 |
16.8 |
18.5 |
|
16 |
18.2 |
19.9 |
21.6 |
|
17 |
21 |
23 |
25 |
|
18 |
24.8 |
26.8 |
28.2 |
|
19 |
28.5 |
30.7 |
33 |
|
20 |
31 |
33.3 |
35.7 |
|
21 |
32.5 |
35.2 |
38 |
|
22 |
36 |
39.5 |
43 |
|
23 |
39 |
42.2 |
45.5 |
|
24 |
42 |
45.2 |
48.5 |
|
25 |
44.5 |
47.7 |
51 |
|
26 |
47 |
50.2 |
53.5 |
|
27 |
49 |
52.7 |
56.5 |
|
28 |
51.5 |
55.2 |
59 |
|
29 |
53 |
57 |
61 |
|
30 |
55.5 |
59.2 |
63 |
|
31 |
57 |
61.2 |
65 |
|
32 |
59 |
63 |
67 |
|
33 |
61 |
65 |
69 |
|
34 |
63 |
68.2 |
72 |
|
35 |
65 |
70.5 |
75 |
|
36 |
69 |
73.5 |
78 |
|
37 |
70.5 |
76.5 |
81 |
|
38 |
74 |
78.5 |
83 |
|
39 |
76 |
81 |
86 |
|
40 |
77.5 |
82.5 |
87.5 |
Estimating Gestational Age from Foot Length
gestational age if assume mean foot length development =
= (4.3 * (10^(-10)) * ((foot length in mm)^6)) + (-7.8 * (10^(-8)) * ((foot length in mm)^5)) + (1.8 * (10^(-6)) * ((foot length in mm)^4)) + (4.041 * (10^(-4)) * ((foot length in mm)^3)) + (-0.028062 * ((foot length in mm)^2)) + (0.9353103 * (foot length in mm)) + 5.381448)
minimum gestational age from foot length =
= (7.4 * (10^(-10)) * ((foot length in mm)^6)) + (-1.9 * (10^(-7)) * ((foot length in mm)^5)) + (1.66 * (10^(-5)) * ((foot length in mm)^4)) + (-5.11 * (10^(-4)) * ((foot length in mm)^3)) + (-0.001758 * ((foot length in mm)^2)) + (0.6063543 * (foot length in mm)) + 6.1692351)
maximum gestational age from foot length =
= (-4.8 * (10^(-10)) * ((foot length in mm)^6)) + (2 * (10^(-7)) * ((foot length in mm)^5)) + (-2.4 * (10^(-5)) * ((foot length in mm)^4)) + (0.0016983 * ((foot length in mm)^3)) + (-0.059862 * ((foot length in mm)^2)) + (1.2813119 * (foot length in mm)) + 4.7547504)
Sung and Singer: Liveborn
|
gestational age (weeks) |
toe heel (cm), mean |
toe heel (cm), low |
toe heel (cm), high |
|---|---|---|---|
|
20 |
3.6 |
2.9 |
4.3 |
|
21 |
3.8 |
3.7 |
3.9 |
|
22 |
4 |
3.6 |
4.4 |
|
23 |
4.2 |
3.7 |
4.7 |
|
24 |
4.4 |
4.1 |
4.7 |
|
25 |
4.6 |
4.2 |
5 |
|
26 |
4.8 |
4.1 |
5.5 |
|
27 |
5 |
4.5 |
5.5 |
|
28 |
5.2 |
4.6 |
5.8 |
|
29 |
5.4 |
4.6 |
6.2 |
|
30 |
5.7 |
5 |
6.4 |
|
31 |
5.9 |
5.2 |
6.6 |
|
32 |
6.1 |
5 |
7.2 |
|
33 |
6.3 |
5.6 |
7 |
|
34 |
6.5 |
5.9 |
7.1 |
|
35 |
6.7 |
6.3 |
7.1 |
|
36 |
6.9 |
5.8 |
8 |
|
37 |
7.1 |
5.9 |
8.3 |
|
38 |
7.3 |
6.5 |
8.1 |
|
39 |
7.5 |
7 |
8 |
|
40 |
7.7 |
6.9 |
8.5 |
|
41 |
7.9 |
7.1 |
8.7 |
|
42 |
8.1 |
7 |
9.2 |
week gestation with mean foot length =
= ((foot length in cm) * 4.8427641) + 2.6382466
week gestation maximum for foot length =
= ((foot length in cm) * 4.2384628) + 3.3209954
week gestation minimum for foot length =
= ((foot length in cm) * 5.3378959) + 3.3357745
Sung and Singer: Stillborn
|
gestational age (weeks) |
toe heel (cm), mean |
toe heel (cm), low |
toe heel (cm), high |
|---|---|---|---|
|
20 |
3.3 |
2.7 |
3.9 |
|
21 |
3.5 |
2.9 |
4.1 |
|
22 |
3.8 |
3.4 |
4.2 |
|
23 |
4 |
3.5 |
4.5 |
|
24 |
4.2 |
3.4 |
5 |
|
25 |
4.4 |
3.6 |
5.2 |
|
26 |
4.7 |
3.8 |
5.6 |
|
27 |
4.9 |
3.5 |
6.3 |
|
28 |
5.1 |
3.9 |
6.3 |
|
29 |
5.3 |
4.1 |
6.5 |
|
30 |
5.6 |
4.9 |
6.3 |
|
31 |
5.8 |
5.1 |
6.5 |
|
32 |
6 |
5.4 |
6.6 |
|
33 |
6.2 |
5.8 |
6.6 |
|
34 |
6.5 |
5.7 |
7.3 |
|
35 |
6.7 |
5.8 |
7.6 |
|
36 |
6.9 |
6.1 |
7.7 |
|
37 |
7.2 |
6.3 |
8.1 |
|
38 |
7.4 |
6.6 |
8.2 |
|
39 |
7.6 |
7.1 |
8.1 |
|
40 |
7.8 |
7.1 |
8.5 |
|
41 |
8.1 |
7.3 |
8.9 |
|
42 |
8.3 |
7.8 |
8.8 |
week gestation with mean foot length =
(4.4061009 * (foot length in cm)) + 5.463772
week gestation maximum for foot length =
= (4.3113438 * (foot length in cm)) + 2.7325805
week gestation minimum for foot length =
= (4.2683692 * (foot length in cm)) + 9.5096891
Specialty: Obstetrics & Gynecology, Pedatrics
ICD-10: ,
