| β-HCG concentration | ||
|
| (mlu/ml) | |
| Weeks | Lower limit | Highest limit |
| 1 - 4 | 5.0 | 440 |
| 5 - 8 | 48 | 215,000 |
| 9 - 12 | 18,500 | 335,000 |
| 13 - 16 | 16,324 | 300,050 |
| 17 - 20 | 16,240 | 244,000 |
| 21 - 24 | 16,050 | 219,040 |