A member asked:

I have irregular periods but never normally this long, i'm 8 and a half weeks late and have done 2 pregnancy tests which have both been negative?

A doctor has provided 1 answer

Needs evaluated: Urine pregnancy tests while quite accurate depend on the particular hormone being in the urine. This in turns depends on the level of hormone in the blood [varies person-person and length of gestation] and how the kidneys are functioning. Many pregnant women have neg urine for as long as two months. A blood pregnancy test is completely reliable. Perhaps pregnancy needs ruled out.

Answered 5/7/2014

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