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How accurate are blood tests?

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Sjulia2009

Asked by Sjulia2009 at 8:26 PM on Mar. 27, 2011 in Trying to Conceive

Level 2 (5 Credits)
Answers (6)
  • there pretty damn accurate
    mamawilbur

    Answer by mamawilbur at 8:30 PM on Mar. 27, 2011

  • to see if your pregnant? I think they are around 100%
    jenn4443

    Answer by jenn4443 at 8:30 PM on Mar. 27, 2011

  • They're significantly less than 100% accurate:

    False positives (when they read 'pregnant' and you're not) are extremely rare, and are usually a result of an undetected miscarriage or a very rare form of ovarian cancer.

    False negatives happen frequently for all kinds of reasons, from obesity to being a 'low emitter' of hCg.
    LindaClement

    Answer by LindaClement at 8:34 PM on Mar. 27, 2011

  • They're just as accurate as urine samples, if not more accurate. All they're looking for is the level of HCG in your blood to determine if you're pregnant. If that's infact what you're refering to.
    JazzlikeMraz

    Answer by JazzlikeMraz at 8:35 PM on Mar. 27, 2011

  • They are VERY accurate as long as you are 7 days past ovulation.

    They can determine whether your HCG is over 5 indicating a pregnancy where as most sensitive urine test cannot pick up a pregnancy until your HCG is at least twenty.
    miasmommy21407

    Answer by miasmommy21407 at 8:41 PM on Mar. 27, 2011

  • they are normally correct i believe
    angelrach86

    Answer by angelrach86 at 11:13 PM on Mar. 27, 2011

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