9 R e f e r e n c i a s o b s t é t r i c a s
Longitud del fémur, Merz
Merz E, Kim-Kern M-S, Pehl S. " Ultrasonic Mensuration of Fetal Limb Bones in the Second and Third Trimesters."
Clinical Ultrasound
15:175, March/April 1987.
5 & 95%: (2 Desviaciones estándar/2 * 1,645)
Sem. Dia
5%
Media
95%
Sem. Dia
13 0
9.4
11.0
12.6
18 6
13 1
9.7
11.3
12.9
19 0
13 2
10.0
11.6
13.2
19 1
13 3
10.3
11.9
13.5
19 2
13 4
10.5
12.1
13.7
19 3
13 5
10.8
12.4
14.0
19 4
13 6
11.1
12.7
14.3
19 5
14 0
11.4
13.0
14.6
19 6
14 1
11.7
13.3
14.9
20 0
14 2
12.0
13.6
15.2
20 1
14 3
12.3
13.9
15.5
20 2
14 4
12.5
14.1
15.7
20 3
14 5
12.8
14.4
16.0
20 4
14 6
13.1
14.7
16.3
20 5
15 0
13.4
15.0
16.6
20 6
15 1
13.8
15.6
17.3
21 0
15 2
14.3
16.1
18.0
21 1
15 3
14.7
16.7
18.7
21 2
15 4
15.2
17.3
19.4
21 3
15 5
15.6
17.9
20.1
21 4
15 6
16.1
18.4
20.8
21 5
16 0
16.5
19.0
21.5
21 6
16 1
16.9
19.4
21.9
22 0
16 2
17.4
19.9
22.4
22 1
16 3
17.8
20.3
22.8
22 2
16 4
18.2
20.7
23.2
22 3
16 5
18.6
21.1
23.6
22 4
16 6
19.1
21.6
24.1
22 5
17 0
19.5
22.0
24.5
22 6
17 1
19.9
22.4
24.9
23 0
17 2
20.4
22.9
25.4
23 1
17 3
20.8
23.3
25.8
23 2
17 4
21.2
23.7
26.2
23 3
17 5
21.6
24.1
26.6
23 4
17 6
22.1
24.6
27.1
23 5
18 0
22.5
25.0
27.5
23 6
18 1
22.9
25.4
27.9
24 0
18 2
23.4
25.9
28.4
24 1
18 3
23.8
26.3
28.8
24 2
18 4
24.2
26.7
29.2
24 3
18 5
24.6
27.1
29.6
24 4
Longitud del fémur, Jeanty
Jeanty P, Dramaix-Wilmet M, van Kerkem J, Petroons P, Schwers J. "Ultrasonic Evaluation of Fetal Limb Growth, Part II"
Radiology
143:751, 1982.
LF (mm)= -36,040470 + 4,1626390 * EM(semanas) - 0,0346367 * EM
Sem. Dia
5%
Media
95%
Sem. Dia
13 0
5.6
12.2
18.8
18 3
13 1
6.1
12.7
19.3
18 4
13 2
6.6
13.1
19.7
18 5
13 3
7.0
13.6
20.2
18 6
13 4
7.5
14.1
20.7
19 0
13 5
8.0
14.5
21.1
19 1
13 6
8.4
15.0
21.6
19 2
14 0
8.9
15.4
22.0
19 3
14 1
9.3
15.9
22.5
19 4
14 2
9.8
16.4
22.9
19 5
14 3
10.2
16.8
23.4
19 6
14 4
10.7
17.3
23.8
20 0
14 5
11.1
17.7
24.3
20 1
14 6
11.6
18.2
24.7
20 2
15 0
11.3
18.6
26.0
20 3
15 1
11.7
19.1
26.4
20 4
15 2
12.1
19.5
26.8
20 5
15 3
12.6
19.9
27.3
20 6
15 4
13.0
20.4
27.7
21 0
15 5
13.5
20.8
28.2
21 1
15 6
13.9
21.3
28.6
21 2
16 0
14.3
21.7
29.0
21 3
16 1
14.8
22.1
29.5
21 4
16 2
15.2
22.6
29.9
21 5
16 3
15.7
23.0
30.3
21 6
16 4
16.1
23.4
30.8
22 0
16 5
16.5
23.9
31.2
22 1
16 6
16.9
24.3
31.6
22 2
17 0
20.3
24.7
29.1
22 3
17 1
20.7
25.1
29.6
22 4
17 2
21.1
25.6
30.0
22 5
17 3
21.6
26.0
30.4
22 6
17 4
22.0
26.4
30.8
23 0
17 5
22.4
26.8
31.3
23 1
17 6
22.8
27.2
31.7
23 2
18 0
23.2
27.7
32.1
23 3
18 1
23.7
28.1
32.5
23 4
18 2
24.1
28.5
32.9
23 5
9 - 4 2
5%
Media
95%
Sem. Dia
5%
Media
25.1
27.6
30.1
24 5
42.4
25.5
28.0
30.5
24 6
42.9
25.9
28.4
30.9
25 0
43.5
26.4
28.9
31.4
25 1
43.7
26.8
29.3
31.8
25 2
43.8
27.2
29.7
32.2
25 3
44.0
27.6
30.1
32.6
25 4
44.2
28.1
30.6
33.1
25 5
44.4
28.5
31.0
33.5
25 6
44.5
29.0
31.6
34.2
26 0
44.7
29.4
32.1
34.9
26 1
45.0
29.9
32.7
35.6
26 2
45.2
30.3
33.3
36.2
26 3
45.5
30.8
33.9
36.9
26 4
45.7
31.2
34.4
37.6
26 5
46.0
31.7
35.0
38.3
26 6
46.2
32.0
35.1
38.3
27 0
46.5
32.2
35.3
38.4
27 1
46.8
32.5
35.4
38.4
27 2
47.2
32.7
35.6
38.4
27 3
47.5
33.0
35.7
38.4
27 4
47.9
33.2
35.9
38.5
27 5
48.2
33.5
36.0
38.5
27 6
48.6
34.0
36.6
39.2
28 0
48.9
34.4
37.1
39.9
28 1
48.9
34.9
37.7
40.6
28 2
48.9
35.3
38.3
41.2
28 3
48.9
35.8
38.9
41.9
28 4
48.9
36.2
39.4
42.6
28 5
48.9
36.7
40.0
43.3
28 6
48.9
37.1
40.3
43.5
29 0
48.9
37.5
40.6
43.6
29 1
49.6
37.9
40.9
43.8
29 2
50.2
38.3
41.1
44.0
29 3
50.9
38.7
41.4
44.2
29 4
51.5
39.1
41.7
44.3
29 5
52.2
39.5
42.0
44.5
29 6
52.8
40.1
42.6
45.1
30 0
53.5
40.6
43.1
45.6
30 1
53.7
41.2
43.7
46.2
30 2
54.0
41.8
44.3
46.8
30 3
54.2
5%
Media
95%
Sem. Dia
5%
Media
24.5
28.9
33.3
23 6
37.3
24.9
29.3
33.7
24 0
37.6
25.3
29.7
34.2
24 1
38.0
25.7
30.1
34.6
24 2
38.4
22.7
30.5
38.4
24 3
38.7
23.1
31.0
38.8
24 4
39.1
23.5
31.4
39.2
24 5
39.4
23.9
31.8
39.6
24 6
39.8
24.3
32.2
40.0
25 0
38.4
24.7
32.6
40.4
25 1
38.7
25.1
33.0
40.8
25 2
39.0
25.5
33.4
41.2
25 3
39.4
25.9
33.8
41.6
25 4
39.7
26.3
34.1
42.0
25 5
40.1
26.7
34.5
42.4
25 6
40.4
27.1
34.9
42.8
26 0
40.8
27.5
35.3
43.2
26 1
41.1
27.9
35.7
43.6
26 2
41.4
27.4
36.1
44.8
26 3
41.8
27.7
36.5
45.2
26 4
42.1
28.1
36.9
45.6
26 5
42.4
28.5
37.3
46.0
26 6
42.7
28.9
37.6
46.4
27 0
45.0
29.3
38.0
46.8
27 1
45.4
29.7
38.4
47.1
27 2
45.7
30.0
38.8
47.5
27 3
46.0
30.4
39.1
47.9
27 4
46.3
30.8
39.5
48.3
27 5
46.7
31.2
39.9
48.6
27 6
47.0
31.5
40.3
49.0
28 0
47.3
31.9
40.6
49.4
28 1
47.6
32.3
41.0
49.8
28 2
47.9
35.1
41.4
47.6
28 3
48.2
35.5
41.7
48.0
28 4
48.6
35.8
42.1
48.4
28 5
48.9
36.2
42.5
48.7
28 6
49.2
36.6
42.8
49.1
29 0
49.1
36.9
43.2
49.5
29 1
49.4
95%
Sem. Dia
5%
Media
95%
44.9
47.4
30 4
54.4
58.3
45.4
47.9
30 5
54.6
58.9
46.0
48.5
30 6
54.9
59.4
46.3
48.9
31 0
55.1
60.0
46.6
49.3
31 1
55.2
60.1
46.9
49.7
31 2
55.4
60.3
47.1
50.1
31 3
55.5
60.4
47.4
50.5
31 4
55.7
60.6
47.7
50.9
31 5
55.8
60.7
48.0
51.3
31 6
56.0
60.9
48.1
51.3
32 0
56.1
61.0
48.3
51.4
32 1
56.6
61.4
48.4
51.4
32 2
57.2
61.9
48.6
51.4
32 3
57.7
62.3
48.7
51.4
32 4
58.3
62.7
48.9
51.5
32 5
58.8
63.1
49.0
51.5
32 6
59.4
63.6
49.6
52.3
33 0
59.9
64.0
50.1
53.1
33 1
60.1
64.3
50.7
53.9
33 2
60.2
64.6
51.3
54.7
33 3
60.4
64.9
51.9
55.5
33 4
60.6
65.1
52.4
56.3
33 5
60.8
65.4
53.0
57.1
33 6
60.9
65.7
53.0
57.1
34 0
61.1
66.0
53.0
57.1
34 1
61.2
66.1
53.0
57.1
34 2
61.4
66.3
53.0
57.1
34 3
61.5
66.4
53.0
57.1
34 4
61.7
66.6
53.0
57.1
34 5
61.8
66.7
53.0
57.1
34 6
62.0
66.9
53.4
57.3
35 0
62.1
67.0
53.9
57.5
35 1
62.4
67.4
54.3
57.7
35 2
62.7
67.9
54.7
57.9
35 3
63.0
68.3
55.1
58.1
35 4
63.3
68.7
55.6
58.3
35 5
63.6
69.1
56.0
58.5
35 6
63.9
69.6
56.6
59.4
36 0
64.2
70.0
57.1
60.3
36 1
64.8
70.3
57.7
61.2
36 2
65.5
70.6
2
5 & 95%: (1 Desviación estándar * 1,645)
95%
Sem. Dia
5%
Media
95%
43.6
49.8
29 2
49.7
56.2
43.9
50.2
29 3
50.0
56.5
44.3
50.5
29 4
50.3
56.8
44.6
50.9
29 5
50.6
57.1
45.0
51.2
29 6
50.9
57.4
45.3
51.6
30 0
51.2
57.7
45.7
52.0
30 1
51.5
58.0
46.0
52.3
30 2
51.8
58.3
46.4
54.4
30 3
52.1
58.6
46.7
54.7
30 4
52.3
58.8
47.1
55.1
30 5
52.6
59.1
47.4
55.4
30 6
52.9
59.4
47.8
55.8
31 0
52.8
59.7
48.1
56.1
31 1
53.1
60.0
48.4
56.5
31 2
53.3
60.3
48.8
56.8
31 3
53.6
60.6
49.1
57.1
31 4
53.9
60.9
49.4
57.5
31 5
54.2
61.1
49.8
57.8
31 6
54.5
61.4
50.1
58.1
32 0
54.7
61.7
50.4
58.5
32 1
55.0
62.0
50.8
58.8
32 2
55.3
62.2
51.1
57.2
32 3
55.6
62.5
51.4
57.5
32 4
55.8
62.8
51.8
57.8
32 5
56.1
63.1
52.1
58.1
32 6
56.4
63.3
52.4
58.5
33 0
56.5
63.6
52.7
58.8
33 1
56.7
63.9
53.0
59.1
33 2
57.0
64.1
53.4
59.4
33 3
57.3
64.4
53.7
59.7
33 4
57.5
64.7
54.0
60.0
33 5
57.8
64.9
54.3
60.4
33 6
58.1
65.2
54.6
60.7
34 0
58.3
65.4
54.9
61.0
34 1
58.6
65.7
55.2
61.3
34 2
58.8
66.0
55.5
62.0
34 3
59.1
66.2
55.9
62.3
34 4
59.3
66.5
R E F E R E N C I A
Journal of
Sem. Dia
5%
Media
95%
62.2
36 3
66.1
70.9
75.6
63.1
36 4
66.8
71.1
75.5
64.0
36 5
67.4
71.4
75.4
64.9
36 6
68.1
71.7
75.4
65.0
37 0
68.7
72.0
75.3
65.2
37 1
68.8
72.3
75.8
65.3
37 2
68.8
72.6
76.3
65.5
37 3
68.9
72.9
76.8
65.6
37 4
68.9
73.1
77.4
65.8
37 5
69.0
73.4
77.9
65.9
37 6
69.0
73.7
78.4
66.2
38 0
69.1
74.0
78.9
66.5
38 1
69.1
74.3
79.4
66.8
38 2
69.2
74.6
80.0
67.2
38 3
69.2
74.9
80.5
67.5
38 4
69.3
75.1
81.0
67.8
38 5
69.3
75.4
81.5
68.1
38 6
69.4
75.7
82.1
68.5
39 0
69.4
76.0
82.6
68.9
39 1
70.0
76.1
82.3
69.3
39 2
70.6
76.3
81.9
69.7
39 3
71.2
76.4
81.6
70.1
39 4
71.9
76.6
81.3
70.5
39 5
72.5
76.7
81.0
70.9
39 6
73.1
76.9
80.6
71.0
40 0
73.7
77.0
80.3
71.2
40 1
73.7
77.0
80.3
71.3
40 2
73.7
77.0
80.3
71.5
40 3
73.7
77.0
80.3
71.6
40 4
73.7
77.0
80.3
71.8
40 5
73.7
77.0
80.3
71.9
40 6
73.7
77.0
80.3
72.5
41 0
73.7
77.0
80.3
73.0
41 1
73.5
77.1
80.8
73.6
41 2
73.3
77.3
81.3
74.1
41 3
73.1
77.4
81.8
74.7
41 4
72.8
77.6
82.3
75.2
41 5
72.6
77.7
82.8
75.8
41 6
72.4
77.9
83.3
75.7
42 0
72.2
78.0
83.8
75.7
Sem. Dia
5%
Media
95%
62.7
34 5
59.6
66.7
73.9
63.0
34 6
59.8
67.0
74.1
63.3
35 0
61.3
67.2
73.1
63.6
35 1
61.6
67.5
73.4
63.9
35 2
61.8
67.7
73.6
64.2
35 3
62.1
68.0
73.9
64.5
35 4
62.3
68.2
74.1
64.8
35 5
62.6
68.4
74.3
65.0
35 6
62.8
68.7
74.6
65.3
36 0
63.0
68.9
74.8
65.6
36 1
63.3
69.2
75.1
65.9
36 2
63.5
69.4
75.3
66.7
36 3
63.7
69.6
75.5
67.0
36 4
64.0
69.9
75.8
67.2
36 5
64.2
70.1
76.0
67.5
36 6
64.4
70.3
76.2
67.8
37 0
63.7
70.6
77.5
68.1
37 1
63.9
70.8
77.7
68.4
37 2
64.1
71.0
77.9
68.6
37 3
64.3
71.2
78.1
68.9
37 4
64.6
71.5
78.4
69.2
37 5
64.8
71.7
78.6
69.5
37 6
65.0
71.9
78.8
69.7
38 0
65.2
72.1
79.0
70.0
38 1
65.4
72.3
79.2
70.3
38 2
65.7
72.6
79.5
70.7
38 3
65.9
72.8
79.7
71.0
38 4
66.1
73.0
79.9
71.3
38 5
66.3
73.2
80.1
71.5
38 6
66.5
73.4
80.3
71.8
39 0
63.8
73.6
83.5
72.1
39 1
64.0
73.8
83.7
72.3
39 2
64.2
74.0
83.9
72.6
39 3
64.4
74.2
84.1
72.8
39 4
64.6
74.4
84.3
73.1
39 5
64.8
74.6
84.5
73.4
39 6
65.0
74.8
84.7
73.6
40 0
65.2
75.0
84.9
D E L
S I S T E M A