Because : Blood is more sensitive, blood detects down to 2-5 miu HCG urine can go down to about 25-30 miu and urine can be influenced by the concentration of the urine.
Answered 6/10/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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