Table 5 Thresholds of serum β-hCG level for prediction of clinical pregnancies and live births
From: Possibility of live birth in patients with low serum β-hCG 14 days after blastocyst transfer
Pregnancy outcomes | Clinical pregnancy | Live birth | Clinical pregnancy | Live birth |
|---|---|---|---|---|
Threshold of β-hCG level (mIU/ml) | Threshold of β-hCG fold increase over 48 h | |||
58.8 | 108.6 | 1.4 | 1.9 | |
AUC | 0.752 | 0.649 | 0.899 | 0.808 |
95% CI of AUC | 0.680–0.823 | 0.583–0.715 | 0.801–0.996 | 0.724–0.891 |
Sensitivity % | 95.0 | 93.1 | 90.3 | 88.5 |
Specificity % | 53.5 | 37.0 | 77.8 | 64.5 |
PPVa % | 85.8 | 25.2 | 97.4 | 63.6 |
NPVb % | 73.3 | 95.9 | 33.3 | 92.3 |