hCG ranges are very wide and overlap, so one number cannot date a pregnancy or show whether it is healthy. Doctors look at the change over 48 hours and, from about 1,500–2,000 mIU/ml, at the ultrasound.
| Weeks since last period | Typical hCG range |
|---|---|
| 3 weeks | 5 – 50 mIU/ml |
| 4 weeks | 5 – 426 mIU/ml |
| 5 weeks | 18 – 7,340 mIU/ml |
| 6 weeks | 1,080 – 56,500 mIU/ml |
| 7–8 weeks | 7,650 – 229,000 mIU/ml |
| 9–12 weeks | 25,700 – 288,000 mIU/ml |
| 13–16 weeks | 13,300 – 254,000 mIU/ml |
| 17–24 weeks | 4,060 – 165,400 mIU/ml |
| 25–40 weeks | 3,640 – 117,000 mIU/ml |
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hCG (human chorionic gonadotropin) is the pregnancy hormone measured by blood and urine tests. In a healthy early pregnancy it roughly doubles every 2–3 days until about 6–7 weeks, then rises more slowly and peaks at 8–11 weeks.
Enter two results and the hours between them to see the doubling time and the rise over 48 hours. Doctors generally expect a rise of at least 35% in 48 hours; a slower rise or a fall is followed up with repeat tests and an ultrasound.
| First hCG Result | 120 mIU/ml |
| Second hCG Result (optional) | 260 mIU/ml |
| Hours Between Tests | 48 hours |
| hCG doubling time | 43 hours (1.8 days) |
| Rise in 48 hours | +117% |
| Typical doubling time at this level | 48–72 hours |
| Assessment | A normal rise for an early pregnancy |
| Readings | 120 → 260 mIU/ml |
Doubling time 43 hours (1.8 days); A normal rise for an early pregnancy.
Try this example →| First hCG Result | 1,500 mIU/ml |
| Second hCG Result (optional) | 2,200 mIU/ml |
| Hours Between Tests | 48 hours |
| hCG doubling time | 86.9 hours (3.6 days) |
| Rise in 48 hours | +47% |
| Typical doubling time at this level | 72–96 hours |
| Assessment | Within the lower limit of normal (at least 35% in 48 hours) — your doctor may repeat the test |
| Readings | 1,500 → 2,200 mIU/ml |
86.9 hours (3.6 days); rise +47%.
Try this example →About 48–72 hours while hCG is under 1,200 mIU/ml, 72–96 hours between 1,200 and 6,000, and longer above 6,000.
At least about 35%. A 49% or greater rise is reassuring; most viable pregnancies rise 50–100% or more.
Under 5 mIU/ml is negative and over 25 mIU/ml is positive; 5–25 is a grey zone to repeat in 2 days.
Twins often have higher levels, but the ranges overlap so much that only an ultrasound can tell.