The crown-to-heal length can be estimated from gestational age if there is normal development.
Sung and Singer: Liveborn
gestational age (weeks) |
crown heel (cm), mean |
crown heel (cm), low |
crown heel (cm), high |
---|---|---|---|
20 |
25.6 |
23.4 |
27.8 |
21 |
26.7 |
25 |
28.4 |
22 |
27.8 |
26.2 |
29.4 |
23 |
28.9 |
25.9 |
31.9 |
24 |
30 |
28.3 |
31.7 |
25 |
31.1 |
29.1 |
33.1 |
26 |
32.2 |
29.8 |
34.6 |
27 |
33.4 |
29.9 |
36.9 |
28 |
34.5 |
32.2 |
36.8 |
29 |
35.6 |
31.2 |
40 |
30 |
36.7 |
32.5 |
40.9 |
31 |
37.8 |
34.7 |
40.9 |
32 |
38.9 |
33.2 |
44.6 |
33 |
40 |
36.5 |
43.5 |
34 |
41.1 |
37.1 |
45.1 |
35 |
42.3 |
39.4 |
45.2 |
36 |
43.4 |
37.5 |
49.3 |
37 |
44.5 |
37.5 |
51.5 |
38 |
45.6 |
40.5 |
50.7 |
39 |
46.7 |
42.3 |
51.1 |
40 |
47.8 |
43.6 |
52 |
41 |
48.9 |
43.5 |
54.3 |
42 |
50 |
46.2 |
53.8 |
week gestation with mean crown heel length =
= (0.8997036 * (crown heel length in cm))-3.012706
week gestation maximum for crown heel length =
= (0.7750055 * (crown heel length in cm))-1.129034
week gestation minimum for crown heel length =
= (1.0270155 * (crown heel length in cm))-4.074811
Sung and Singer: Stillborn
gestational age (weeks) |
crown heel (cm), mean |
crown heel (cm), low |
crown heel (cm), high |
---|---|---|---|
20 |
24.9 |
22.6 |
27.2 |
21 |
26.2 |
22.6 |
29.8 |
22 |
27.4 |
24.9 |
29.9 |
23 |
28.7 |
25.4 |
32 |
24 |
29.9 |
25.6 |
34.2 |
25 |
31.1 |
24.6 |
37.6 |
26 |
32.4 |
27.1 |
37.7 |
27 |
33.6 |
30.4 |
36.8 |
28 |
34.9 |
29.3 |
40.5 |
29 |
36.1 |
30.2 |
42 |
30 |
37.3 |
33.7 |
40.9 |
31 |
38.6 |
35.9 |
41.3 |
32 |
39.8 |
34.4 |
45.2 |
33 |
41.1 |
38 |
44.2 |
34 |
42.3 |
38 |
46.6 |
35 |
43.5 |
37.7 |
49.3 |
36 |
44.8 |
37.6 |
52 |
37 |
46 |
38.1 |
53.9 |
38 |
47.3 |
43.4 |
51.2 |
39 |
48.5 |
43.6 |
53.4 |
40 |
49.7 |
46.5 |
52.9 |
41 |
51 |
46.6 |
56.4 |
42 |
52.2 |
49.2 |
55.2 |
week gestation with mean crown heel length =
= (0.8064293 * (crown heel length in cm)) - 0.110638
week gestation maximum for crown heel length =
= (0.7466038 * (crown heel length in cm)) - 1.142919
week gestation minimum for crown heel length =
= (0.8134105 * (crown heel length in cm)) + 3.2237983
Specialty: Obstetrics & Gynecology, Pedatrics
ICD-10: ,