hCG Levels

Key things to remember about hCG levels:

In a bout 85% of normal pregnancies, the hCG level will double every 48 - 72 hours. As you get further along in pregnancy and the hCG level gets higher, the time it takes to double can increase to about every 96 hours.
A normal pregnancy may have low hCG levels and result in a perfectly healthy baby. An early ultrasound (between 5-6 weeks) is more accurate than using hCG numbers.
An hCG level of less than 5mIU/ml is considered negative for pregnancy, and anything above 25mIU/ml is considered positive for pregnancy.
A single hCG reading is not enough information for most diagnoses. When there is a question regarding the health of the pregnancy, multiple testings of hCG levels done at least 2-3 days apart give a more accurate assessment of the situation.
There are two types of hCG tests.

- A qualitative hCG test detects if hCG is present in the blood, this gives you a "positive or negative" result. A quantitative hCG test (or beta hCG) measures the amount of hCG actually present in the blood, this is the test that is most commonly used, as it gives you an actual number.

Normal hCG Levels

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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Key things to remember about hCG levels:

hCG Levels