is it possible for pregnancy test to give false positive?
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In very rare cases, you can have a false-positive result. This means you're not pregnant but the test says you are. You could have a false-positive result if you have blood or protein in your pee. Certain drugs, such as tranquilizers, anticonvulsants, hypnotics, and fertility drugs, could cause false-positive results.
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Sometimes you can get a false negative on your pregnancy test – meaning you're pregnant, but the test says otherwise. On the flipside, you can miss your period, but you're not pregnant.
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Share on Pinterest After an abortion or miscarriage, a home pregnancy test may produce a false-positive result, since the levels of hCG in the body may still be relatively high. Taking a home urine pregnancy test, following an abortion or miscarriage, can be another reason for a false-positive result.
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False negative tests are common. In fact, many women get false negative tests before they get a positive. This is because the body's HCG levels have not yet risen sufficiently high to indicate that a woman is pregnant. In many cases, a woman will later get a positive test if she just waits a few days.
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A very rare cause of a false negative is if the hCG hormone in your body doesn't react with the anti-hCG chemicals in the pregnancy test. If this is the problem, you may need to wait a few more days before you can get a positive result. Or, you may need to have a blood test.
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A false negative on a home pregnancy test is possible, but extremely unlikely. As long as your urine got on the test's absorbent strip, it should be accurate. You can always take another test if you're worried you might have missed. Something that can give you a false negative is taking the test too early.
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OPKs have a high false positive as well as a high false negative rate for being pregnant. If an OPK is positive, you could still NOT be pregnant, and if it's negative you could still BE pregnant.
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Test Errors A false negative can also happen due to test error. If you wait too long to read the results, you may get a false negative. That said, false positives are more common with reading a test too late. Make sure you follow the directions of your particular pregnancy test.
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A false-positive result indicates a pregnancy even though there isn't one. Rarely, the test may detect abnormal, non-pregnancy tissue, which requires follow-up by a doctor. These results are rare because usually only pregnant women produce the hCG hormone. There's a higher risk of getting a false-negative result.
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You might get your period a few days after a positive pregnancy test and assume you had a false-positive result. However, it could be that you were pregnant but miscarried very early on. “It's not that the test is wrong—it was completely accurate at picking up the hormone [hCG]," Dr.
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Pregnancy test false negatives are possible. Despite marketing claims that home pregnancy tests are 99 percent accurate, research over the past decade has shown that up to 5 percent of them return false negatives. Each year, women in the US rely on some 20 million of these tests.
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This is why a positive pregnancy test result will mean you are almost certainly pregnant. However, in rare instances, you can get a false positive from: a recent pregnancy (e.g. after miscarriage, recent birth or termination) some rare ovarian cysts.
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It may be easy to think a faint line is a false positive, but it's very, very rare to get a false positive result. You can read more about false positive pregnancy test results here.
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It's possible to get a negative result from a home pregnancy test when you're actually pregnant.
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Testing too early is unreliable as it can lead to a false result. If it's negative, it doesn't mean that you aren't pregnant—it could just be too early to tell.
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False Negative Pregnancy Tests However, this is not always the case. False negative pregnancy tests do occur. In fact, it is possible to have a negative result on a pregnancy test and actually be pregnant.
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In the end, though, an improperly stored test can give false results. As Cosmopolitan puts it, “Heat or moisture can cause damage to the test window on a pregnancy test and this can also result in inaccurate results.”