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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Fertil Steril. 2013 Dec 17;101(2):392–398. doi: 10.1016/j.fertnstert.2013.11.003

Table 2.

Diagnostic test characteristics for prediction of pregnancy and ongoing pregnancy beyond 9 weeks of gestation

Sensitivity (%) Specificity (%) Positive predictive value (%) Negative predictive value (%)
Ongoing Pregnancy
Day 9 hhCG > 110 pg/ml 47 96 94 59
Day 9 hCG > 5 mIU/ml 18 96 85 48
Day 16 hhCG > 8165 pg/ml 77 96 96 77
Day 16 hCG > 237 mIU/ml 79 96 96 79
Delta hhCG >8150 pg/ml 77 96 96 77
Pregnancy
Day 9 hhCG > 81 pg/ml 54 95 95 51
Day 9 hCG > 4 mIU/ml 24 97 95 40
Day 16 hhCG > 242 pg/ml 100 100 100 100
Delta hhCG >226 pg/ml 100 100 100 100