下面这个列出每个时期的羊水深度正常值，各位孕妈可以对照数据数据参考一下。
| 孕周均值标准差 | |||
| 孕周 | 均值（单位cm） | 标准差 | |
| 14 | 3.31 | 0.79 | |
| 15 | 3.60 | 0.82 | |
| 16 | 3.55 | 0.63 | |
| 17 | 3.93 | 0.96 | |
| 18 | 4.14 | 0.72 | |
| 19 | 4.30 | 0.68 | |
| 20 | 4.55 | 0.74 | |
| 21 | 4.63 | 0.76 | |
| 22 | 4.78 | 0.75 | |
| 23 | 5.09 | 0.74 | |
| 24 | 5.09 | 0.74 | |
| 25 | 6.34 | 0.80 | |
| 26 | 5.42 | 0.74 | |
| 27 | 5.47 | 0.74 | |
| 28 | 5.54 | 0.82 | |
| 29 | 5.50 | 0.75 | |
| 30 | 5.50 | 0.75 | |
| 31 | 5.51 | 0.66 | |
| 32 | 5.48 | 0.68 | |
| 33 | 5.49 | 0.65 | |
| 34 | 5.48 | 0.67 | |
| 35 | 5.40 | 0.57 | |
| 36 | 5.42 | 0.66 | |
| 37 | 5.23 | 0.66 | |
| 38 | 5.11 | 0.71 | |
| 39 | 4.95 | 0.71 | |
| 40 | 4.74 | 0.54 | |
| 41 | 4.65 | 0.39 | |
