| 孕期正常参数值 |
| 孕周 |
双顶径(平均值)cm |
腹围(平均值)cm |
股骨长(平均值)cm |
| 16周 |
3.62士0.58 |
10.32士1.92 |
2.10士0.51 |
| 18周 |
4.25士0.53 |
12.41士l.89 |
2.71士0.46 |
| 20周 |
4.88士0.58 |
14.80士l.89 |
3.35士O.47 |
| 22周 |
5.45士0.57 |
16.70士2.23 |
3.82士0.47 |
| 24周 |
6.05士0.50 |
18.74士2.23 |
4.36士0.51 |
| 26周 |
6.68士0.61 |
21.62士2.30 |
4.87士O.41 |
| 28周 |
7.24士O.65 |
22.86士2.41 |
5.35士0.55 |
| 30周 |
7.83士0.62 |
24.88士2.03 |
5.77士0.47 |
| 32周 |
8.17士0.65 |
26.20士2.33 |
6.43士0.49 |
| 34周 |
8.61士0.63 |
27.99士2.55 |
6.62士0.43 |
| 36周 |
8.81士0.57 |
29.44士2.83 |
6.95士0.47 |
| 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 | |
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