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Wednesday, January 19, 2011


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What would cause multiple positive home pregnancy urine tests when quantative blood tests are coming back negative at the same time?

David Grenache, PhD

Dear Confused:
The situation you describe is very unusual. hCG in the urine comes from the blood so it is very unexpected to detect it in the urine if it is not also in the blood. It is difficult to answer your question without more information.


When a woman reaches the age of 58 and the urine Hcg comes back positive and the blood quantative results read 118.5 mIU/ml and the Dr. says that at that age it is impossible for a woman to concieve can you give an answer what would cause these results to read positive. Concerned


Dear Concerned,

Thanks for your comment. Additional information about the detection of hCG in the absence of pregnancy has been described on this blog here: http://www.pregnancylab.net/2011/10/four-reasons-for-positive-hcg-test-in-the-absence-of-pregnancy.html

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