Why does it take more than one pregnancy test to get 100% certainty? Why is one usually not trusted?
In: Biology
It’s often a factor of time. Pregnancy tests are remarkable accurate in identifying the pregnancy hormone, HCG. However, if there is too little HCG in the bloodstream, the test won’t pick it up.
HCG levels rise very, very quickly in the first few weeks of pregnancy, so a test might be negative when the pregnancy is very new, but positive a few days later.
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