表1 正常妊娠胎头双顶径值（cm）
|
孕周 |
均值±标准差 |
孕周 |
均值±标准差 |
|
11 |
2.08±0.577 |
26 |
6.31±0.773 |
|
12 |
2.35±0.525 |
27 |
6.67±0.820 |
|
13 |
2.58±0.515 |
28 |
7.09±0.403 |
|
14 |
3.03±0.757 |
29 |
7.23±0.682 |
|
15 |
3.45±0.580 |
30 |
7.39±0.802 |
|
16 |
3.79±0.358 |
31 |
7.93±0.636 |
|
17 |
4.10±0.820 |
32 |
7.94±0.580 |
|
18 |
4.28±0.406 |
33 |
8.13±0.367 |
|
19 |
4.26±0.630 |
34 |
8.30±0.628 |
|
20 |
4.68±0.711 |
35 |
8.47±0.614 |
|
21 |
4.79±0.681 |
36 |
8.52±0.515 |
|
22 |
5.15±0.568 |
37 |
8.71±0.566 |
|
23 |
5.47±1.000 |
38 |
8.88±0.354 |
|
24 |
5.80±0.704 |
39 |
8.91±0.536 |
|
25 |
5.81±1.380 |
40 |
9.09±0.429 |
表2 头围（HC）及腹围（AC）的正常均值（cm）
|
孕周 |
HC |
AC |
孕周 |
HC |
AC |
|
12 |
7.0 |
5.6 |
27 |
25.2 |
22.9 |
|
13 |
8.9 |
6.9 |
28 |
26.2 |
24.0 |
|
14 |
9.8 |
8.1 |
29 |
27.1 |
25.0 |
|
15 |
11.1 |
9.3 |
30 |
28.0 |
26.0 |
|
16 |
12.4 |
10.5 |
31 |
28.9 |
27.0 |
|
17 |
13.7 |
11.7 |
32 |
29.7 |
28.0 |
|
18 |
15.0 |
12.9 |
33 |
30.4 |
29.0 |
|
19 |
16.3 |
14.1 |
34 |
31.2 |
30.0 |
|
20 |
17.5 |
15.2 |
35 |
31.8 |
30.9 |
|
21 |
18.7 |
16.4 |
36 |
32.5 |
31.8 |
|
22 |
19.9 |
17.5 |
37 |
33.0 |
32.7 |
|
23 |
21.0 |
18.6 |
38 |
33.6 |
33.6 |
|
24 |
22.1 |
19.7 |
39 |
34.1 |
34.5 |
|
25 |
23.2 |
20.8 |
40 |
34.5 |
35.4 |
|
26 |
24.2 |
21.9 |
|
|
|
表3 股骨长度正常值（cm）
|
孕周 |
股骨长度 |
孕周 |
股骨长度 |
孕周 |
股骨长度 |
|
12 |
0.8 |
22 |
3.9 |
32 |
6.3 |
