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Discrimination between clinical and failed pregnancies using serum hhCG for blastocyst transfers
| Day post ET | Clinical | Chemical | Sensitivity | Specificity |
|---|---|---|---|---|
| 6 day hhCG > = 300 pg/ml | 12/13 | 0/6 | 100 % | 92 % |
| 12 day hhCG> = 6,000 pg/ml | 14/16 | 0/6 | 100 % | 88 % |
