Reviewed by Dr. Grace Ramosena, MBChB on Jan 25, 2026 Enter at least 2 beta-hCG blood test results to estimate doubling time or halving time, compare your trend with typical early-pregnancy ranges, and view a chart. hCG Draw 1 Date and time hCG (IU/L) hCG Draw 2 Date and time hCG (IU/L) Enter at least … Continue reading hCG Doubling Time Calculator (with Chart)