| Pregnancy test | SCD | |
| Normal SCD* < 25% | Abnormal SCD* > 25% | |
| Positive result | 6 | 12 |
| Negative result | 30 | 63 |
| Total | 36 | 75 |
| Statistical analysis | X2 = 0.008 DF = 1 p < 0.05 | |