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Positive test and low HCG

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My last menstrual period was last Sept 27, 2009. last Wednesday , Nov 4, I took home pregnancy test which turn out to be positive. I went to my doctor the same day to get blood test and today Friday, I had the result saying my HCG level is 46. Does this mean I am pregnant ? I heard this is still low to be considered pregnant and have to take again the blood test...

Is this something that I should be worried about ?

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replied November 20th, 2009
Am I Pregnant Answer A7978
Hi, and thanks for your medical question on eHealth forum

An hCG blood level less than 5mIU/ml is considered negative for pregnancy. A level above 25mIU/ml is considered positive for pregnancy. Hence 46 is positive for pregnancy.

The level of hCG depends on the time when the test was done. At about 5 weeks from the last period, the levels vary between 18 - 7,340 mIU/ml. These suddenly shoot up to 1,080 - 56,500 mIU/ml at 6 weeks from last period.

A single hCG reading is not enough information for most diagnoses. Hence you can repeat the test a week later. Increasing levels confirm that the pregnancy is continuing.

Once the hCG levels have reached between 1,000 - 2,000mIU/ml a transvaginal ultrasound is usually able to show a gestational sac. Hope this helps. Take care!

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