Health

False Negative Pregnancy Test Calculator

Estimate the chance your negative test could be wrong.

Days Past Ovulation (DPO)

Test Sensitivity (mIU/mL)

False Negative Risk—

Expected hCG at this DPO—

Recommendation—

hCG roughly doubles every 48 hours. Implantation usually occurs 6–12 DPO. Tests are most accurate ≥14 DPO.