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Calculate how fast your hCG levels are rising in early pregnancy
Weeks since last menstrual period (LMP)
| Weeks | hCG Range (mIU/mL) |
|---|---|
| 3 | 5 - 50 |
| 4 | 5 - 426 |
| 5 | 18 - 7,340 |
| 6 | 1,080 - 56,500 |
| 7-8 | 7,650 - 229,000 |
| 9-12 | 25,700 - 288,000 |
| 13-16 | 13,300 - 254,000 |
| 17-24 | 4,060 - 165,400 |
| 25-40 | 3,640 - 117,000 |
Note: hCG levels vary widely between individuals. A single hCG value is less meaningful than the trend over multiple tests.
Human chorionic gonadotropin (hCG) is a hormone produced by the placenta after implantation. It's the hormone that pregnancy tests detect. In early pregnancy, hCG levels typically double every 48-72 hours.
hCG levels rise rapidly during the first trimester, usually peaking around 8-11 weeks of pregnancy. After that, levels gradually decline and stabilize for the remainder of pregnancy.
The rate at which hCG rises is often more important than the actual level. Healthcare providers use hCG doubling time to help assess pregnancy viability in the early weeks.
This is the expected range for a healthy early pregnancy. Your hCG is rising appropriately.
Could indicate twins or just a naturally fast rise. Usually not a concern but may be worth mentioning to your provider.
May be normal, especially as pregnancy progresses past 6 weeks. Your provider may want to monitor with additional tests or an early ultrasound.
hCG that takes longer than 96 hours to double or is declining may indicate a potential issue. Contact your healthcare provider for evaluation.
There's no single "good" hCG level—the normal range varies enormously. What's more important is that your levels are rising appropriately. A single low hCG can still result in a healthy pregnancy if it's doubling normally.
In early pregnancy (before 6 weeks), hCG typically doubles every 48-72 hours. After 6 weeks, doubling slows to 72-96 hours. Once levels exceed 6,000 mIU/mL, doubling time slows further.
Slow-rising hCG doesn't always mean a problem, but it does warrant monitoring. Your provider may order additional blood tests or an early ultrasound to check on the pregnancy.
Higher-than-average hCG levels or faster doubling times can sometimes indicate twins, but this isn't reliable. Many singleton pregnancies have high hCG, and some twin pregnancies have normal levels. Only an ultrasound can confirm twins.
This calculator is for informational purposes only and should not replace medical advice. hCG levels should be interpreted by a healthcare professional who can consider your complete medical history and other factors. Always consult with your doctor about your specific situation.