|
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
|
|
|
|
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