Residual hCG or New Pregnancy Calculator

Compare two quantitative hCG results after a recent pregnancy to see whether the pattern is more consistent with falling residual hCG or new hCG production.

Two hCG values cannot confirm a new pregnancy, miscarriage, retained tissue, or ectopic pregnancy. Keep any follow-up your clinician arranged.
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Methodology

The calculator normalizes the change between two blood tests to 48 hours. A falling series is also extrapolated toward 5 mIU/mL, but no hCG pattern alone can diagnose pregnancy location or outcome.