hCG Doubling Time Calculator
Assess the viability of early pregnancy with hCG trends.
hCG Doubling Time Form
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Understanding Your Results
In early viable pregnancies, hCG typically doubles every 48-72 hours. Slower rise or falling levels may indicate ectopic pregnancy or miscarriage.
Frequently Asked Questions
What is a normal HCG doubling time?
In early pregnancy, HCG typically rises by at least 53% over 48 hours. Slower rises may suggest ectopic pregnancy or miscarriage.
Can HCG double every 72 hours and still be normal?
After HCG reaches 1,200 mIU/mL, doubling may take up to 72–96 hours. Very slow rises, however, warrant evaluation.
Does a fast doubling time guarantee a healthy pregnancy?
No. While reassuring, ultrasound confirmation of intrauterine pregnancy and fetal heartbeat is the best indicator of viability.
Should I panic if my HCG is not doubling?
Not necessarily. Contact your healthcare provider for interpretation and follow-up testing, including ultrasound.
Book a telemedicine consultation or lab review with Dr. Taimoor Asghar.