Blood Pregnancy Test: What Do HCG Results Mean?

Your details

Your quantitative (beta) hCG blood test result in mIU/mL (also written mIU/L or IU/L - the values are equivalent).
mIU/mL
Count from the first day of your last menstrual period. Weekly reference ranges are published for weeks 3 to 18 only; beyond week 18 the comparison is skipped.
weeks
Result interpretationPositive
Positive - confirmed pregnancy

Clinical meaning of your hCG level

Comparison to weekly rangeBelow typical range for week 5 (217-8,245 mIU/mL)

hCG of 120 mIU/mL is a positive pregnancy result.

  • Your level is below the typical range for this gestational week. A single low reading does not confirm a problem - repeat testing and an ultrasound give a clearer picture.
  • Possible explanations include earlier conception than estimated, slow-rising pregnancy, or ectopic implantation.
  • hCG reference ranges are wide and vary between labs. The trend over time is more informative than any single number.

Next stepSchedule a follow-up blood draw 48-72 hours after your first test to confirm the rise, then arrange an ultrasound once levels reach 1,000-2,000 mIU/mL.

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