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Anonymous asked in Pregnancy & ParentingPregnancy · 9 years ago

Home pregnancy tests....I don`t get it....?

theses tests that state that they can detect pregnancy up 5 days before your missed period (IE First Response)

Well is it not true that your body does not start producing the hormone HCG after the egg has been implanted into the uterus? and that is the time around you miss your period?

so how can it detect something that is not there if you have not missed your period, or do they test something other them HCG??

3 Answers

  • Anonymous
    9 years ago
    Favorite Answer

    Its looking for trace amts of the HCG, youre right. That said, the farther along you are, the more HCG you have in your body, thus the more accurate the test. If you look closely, those "5 days sooner" tests state that the accuracy is reduced at the pre-missed period stage, and increases with each passing day. You may as well just wait til you know your results are going to be 99% accurate. What good is a negative test (I say this bc its VERY rare to get a false positive at any stage) that is only 80% accurate???

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  • helene
    Lv 7
    9 years ago

    It can take 6-12 days for implantation. The average is 9. Nine days past ovulation usually works out to about five days before your period. And your hcg level doubles about every other day, so it gets easier and easier to detect.

    Testing 5 days before your period is due is NOT as accurate as waiting; the chances of a false negative are high. Which is the reason those early-detection tests all have a disclaimer to that effect right on the package.

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  • 9 years ago

    Once sperm enters your body it can take up to 14 days for the fertilized egg to implant if it reached the egg and was successful. It can implant before you are due for another period.

    The test states it can detect pregnancy up to 5 days before you missed period. It can detect pregnancy if the egg has implanted early enough for your body to start making HCG.

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