孕周 双顶径(平均值)cm 腹围(平均值)cm 股骨长(平均值)cm
13周 2.52士0.25 6.90士l.65 1.17士0.31
14周 2.83士0.57 7.77士1.82 1.38士0.48
15周 3.23士0.51 9.13士1.56 1.74士0.58
16周 3.62士0.58 10.32士1.92 2.10士0.51
17周 3.97士0.44 11.49士1.62 2.52士0.44
18周 4.25士0.53 12.41士l.89 2.71士0.46
19周 4.52士0.53 13.59士2.30 3.03士0.50
20周 4.88士0.58 14.80士l.89 3.35士0.47
21周 5.22士0.42 15.62士1.84 3.64士0.40
22周 5.45士0.57 16.70士2.23 3.82士0.47
23周 5.80士0.44 17.90士1.85 4.21士0.41
24周 6.05士0.50 18.74士2.23 4.36士0.51
25周 6.39士0.70 19.64士2.20 4.65士0.42
26周 6.68士0.61 21.62士2.30 4.87士0.41
27周 6.98士0.57 21.81士2.12 5.10士0.41
28周 7.24士0.65 22.86士2.41 5.35士0.55
29周 7.50士0.65 23.71士1.50 5.61士0.44
30周 7.83士0.62 24.88士2.03 5.77士0.47
31周 8.06士0.60 25.78士2.32 6.03士0.38
32周 8.17士0.65 26.20士2.33 6.43士0.49
33周 8.50士0.47 27.78士2.30 6.52士0.46
34周 8.61士0.63 27.99士2.55 6.62士0.43
35周 8.70士0.55 28.74士2.88 6.71士0.45
36周 8.81士0.57 29.44士2.83 6.95士0.47
37周 9.00士0.63 30.14士2.17 7.10士0.52
38周 9.08士0.59 30.63士2.83 7.20士0.43
39周 9.21士0.59 31.34士3.12 7.34士0.53
40周 9.28士0.50 31.49士2.79 7.40士0.53
