A member asked:

Is it normal to have a urine test say neg for pregnant an blood to give a positive? i am 9 weeks along according to gyno.an if so why does it happen?

A doctor has provided 1 answer

Unlikely at 9 weeks: A negative urine and positive blood test is unlikely by 9 weeks. Some urine tests are not very sensitive, so you need more HCG in the urine than the blood test needs. Blood will always turn positive before urine, but usually only a few days to a week before. If the urine is very dilute, it will take longer to show positive. By 9 wks, there is lots of hcg; both should be +. Get ultrasound for dates.

Answered 8/30/2015

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