can a doctors pregnancy test give a 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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False-negative results If an hCG test comes back negative, that generally means you're not pregnant. However, if the test was performed too early in the pregnancy, before your body has had time to produce enough hCG, you can get a false negative.
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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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It is possible to get a false negative on a pregnancy test (where the test says you're not pregnant, even though you are), particularly if you've tested before your period is due. If you've just had one negative result, you could try waiting for a few days and testing again, just to be sure.
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Could a positive result be wrong? Although rare, it's possible to get a positive result from a home pregnancy test when you're not actually pregnant. This is known as a false-positive.
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As with urine/home pregnancy tests, it is possible to end up with false results (both negative and positive) from a blood pregnancy test. ... So, your negative result is because there may not be enough hCG in the blood to detect a pregnancy.
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One explanation for a false negative pregnancy test is what's called the hook effect. It's not common but sometimes this effect leads to urine and blood tests giving the wrong result. This error might happen even after you've had one positive pregnancy test and test again a couple days later.
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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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Birth control cannot give you a false positive or a false negative. At home pregnancy tests rely on a hormone called hCG to detect pregnancy. This hormone is not a component of any common birth control methods including the pill or IUD.
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The hCG shot helps follicles release mature eggs. It may cause a false-positive reading on an at-home pregnancy test, particularly if the test is taken too early. Other medications can also cause false-positive pregnancy tests.
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They're not foolproof, however. It is possible to get a positive result when you're not actually pregnant, which is called a false-positive. If you've been looking forward to a positive pregnancy test result, a false-positive is disappointing. The good news is they're rare.
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What can cause a false positive? Getting a true false positive – one where you were never pregnant in the first place – is incredibly rare. Pregnancy tests detect the hCG (human Chorionic Gonadotrophin) hormone in your body, which is only present when you're pregnant.
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False Negative Pregnancy Tests In fact, it is possible to have a negative result on a pregnancy test and actually be pregnant. Here is how it works: The goal of a urine pregnancy test is to test the urine for a hormone called hCG (Human Chorionic Gonadotropin).
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Serious urinary tract infections (with high levels of WBC, RBC and nitrite) can occasionally cause a false positive pregnancy test result. Ectopic pregnancies typically produce lower levels of hCG than normal preganancies.
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Although rare, it's possible to get a positive result from a home pregnancy test when you're not actually pregnant. This is known as a 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.
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Accuracy. As with urine/home pregnancy tests, it is possible to end up with false results (both negative and positive) from a blood pregnancy test.