Beta-hCG Doubling Time Calculator
Evaluate early pregnancy viability and screen for ectopic pregnancy. Enter two serial quantitative beta-hCG values and the interval — get doubling time, percent rise, and clinical interpretation.
48h-equivalent rise
120.0%
Actual: 120.0% over 48h
Doubling time
42.2 h
Ratio 2.20×
Interpretation
Normal rise (≥66% in 48h). Consistent with viable intrauterine pregnancy. Confirm with TVS when hCG > 1500-2000 mIU/mL (discriminatory zone).
Plot hCG curves automatically
DoctorScribe stores every quantitative hCG, draws the rise curve, marks abnormal trajectories in red, and triggers ectopic protocol reminders — built for early-pregnancy clinics.
Track every PUL patient automatically
DoctorScribe logs serial hCG values, plots the rise curve, calculates doubling time at each visit, and flags abnormal trajectories — never miss an ectopic.