Beta hCG Trend Report
Calculate doubling time from two or more beta hCG values, with gentle, evidence-based context. Not a diagnosis.
Your blood draws
Enter your beta hCG values
Add at least two values. We will calculate the doubling time and give you context. We do not store anything.
Important. hCG levels and doubling time are context, not a diagnosis. Both reassuring and concerning patterns need clinical evaluation. Anything outside expected patterns should prompt contact with your clinic.
Your report
Your hCG Trend
Doubling time and trend context, calculated entirely in your browser.
At a glance
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Doubling time
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Rise in 48 hours
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Latest value
Your trend
What this means
Why a single value tells you little
One hCG number is hard to interpret in isolation. Pregnancies start at very different baseline levels and what matters is the trend. Even a "low" value can be reassuring if it is rising appropriately, and a "high" value can be misleading without context.
Doubling time also naturally slows as levels climb. Above about 1,200 mIU/mL it may take 72 to 96 hours to double. Above 6,000 mIU/mL it can take 96 hours or longer. That is normal.
This is educational information, not medical advice or a diagnosis. Always confirm anything here with your own clinician or clinic. If the tool ever contradicts what they have told you, your clinic is right.