表
15-1 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
15-2 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
15-3 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
|
|
13
|
1.1
|
23
|
4.2
|
33
|
6.5
|
|
14
|
1.5
|
24
|
4.4
|
34
|
6.6
|
|
15
|
1.8
|