表
孕周
WEEK
25.0
25.5
26.0
26.0
26.5
27.0
27.0
27.5
28.0
28.0
28.5
29.0
29.0
29.5
30.0
30.5
31.0
31.0
32.0
32.0
32.5
33.0
34.0
34.5
35.0
35.5
36.5
37.0
37.5
38.0
39.0
39.5
40.0
41.0
42.0
>42
>42
>42
周可量头臀径，胎心搏动明显
表
孕周
WEEK
25.0
25.5
26.0
26.0
26.5
27.0
27.0
27.5
28.0
28.0
28.5
29.0
29.0
29.5
30.0
30.5
31.0
31.0
32.0
32.0
32.5
33.0
34.0
34.5
35.0
35.5
36.5
37.0
37.5
38.0
39.0
39.5
40.0
41.0
42.0
>42
>42
>42
周可量头臀径，胎心搏动明显