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|If your home pregnancy test was positive while a blood test was negative, first and foremost, you must take a second test to confirm whether or not you are pregnant. Home pregnancy tests are around 97% accurate when done correctly. However, a blood test is more accurate, but not necessarily more sensitive. The results depend a lot on the lab, methodology and technique of the blood test performed.
A positive result from a home pregnancy test shows the presence of the hormone human chorionic gonadotropin (hCG) in your system. This is usually a sign that you have become pregnant.
A quantitative blood test, usually called a beta human chorionic gonadotropin (hCG) test, measures the exact units of human chorionic gonadotropin (hCG) in the blood. That means it will detect even the most minimal level. There is another type of blood test sometimes called a qualitative human chorionic gonadotropin (hCG) test. This is a test that simply gives a yes or no answer to whether you are pregnant.
There could be various reasons why your home pregnancy test was positive while a blood test was negative. Just like home pregnancy tests, labs vary as to what is considered a positive pregnancy test. Common cutoffs for positive blood tests for pregnancy are 5, 10, and 25 units. A level under 5 is considered negative. A blood test that is only triggered at 25 units of human chorionic gonadotropin (hCG) is not any more sensitive than several of the home pregnancy tests.
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