can blood in urine cause a positive pregnancy test?
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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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Even in a normal intrauterine pregnancy, false negative urine pregnancy results may occur if the urine is very dilute. A negative urine hCG does not definitively rule out ectopic pregnancy, regardless of the date of the last menstrual period.
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A pregnancy test works by detecting the hCG hormone, which is usually only present in your body if you're pregnant. Your hCG levels will increase over time if you are pregnant. A negative pregnancy test result means the test hasn't detected hCG in your urine.
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You can take a pregnancy test while bleeding or seemingly on your period, because any blood that mixes with your urine will not affect the results of the test. (However, keep in mind that typically a period is a reliable sign that you are not pregnant.)
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According to the popular belief, if you have hCG in your urine, the sugar won't dissolve like it normally would. Instead, advocates of this test say the sugar will clump, indicating pregnancy. So for a supposedly positive result, you'll see clumps of sugar in the bottom of the bowl.
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If you are testing before the date of your expected period, you may be pregnant but your hCG levels are too low for the test to detect. A test may show positive if you have a chemical pregnancy (early pregnancy loss), an ectopic pregnancy, or a molar pregnancy, but this is not a false positive.
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Urine pregnancy tests can detect levels of hCG about 10 days after conception, Moss told Live Science, while blood tests, usually done at a doctor's office, can detect a pregnancy about seven to 10 days after conception.
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Advantages of having a blood test done: Can detect a pregnancy earlier than a urine test at about 7-12 days from possible conception (but if a negative result is received, a test should be repeated if a period is missed.)
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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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Blood tests are done in a doctor's office. They can pick up hCG earlier in a pregnancy than urine tests can. Blood tests can tell if you are pregnant about six to eight days after you ovulate.
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A positive at-home pregnancy test result should always be followed up with a doctor's appointment. Your doctor may give you a urine or blood test to confirm the results and monitor your hCG levels.
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There are some medical conditions that can lead to you seeing a false positive pregnancy test result. The most likely reason is blood or protein in your urine. Blood can be the result of having a urinary tract infection. The presence of protein is more serious; this indicates kidney problems.
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Pregnancy tests work by detecting hCG levels in your urine. When a woman's urine comes in contact with the specially treated strip on a pregnancy test stick, results appear within minutes, indicating whether or not hCG, the pregnancy hormone, has been detected.
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It can find smaller amounts of HCG, and can confirm or rule out a pregnancy earlier than a urine test. A blood test can detect pregnancy even before you've missed a period. Pregnancy blood tests are about 99 percent accurate. A blood test is often used to confirm the results of a home pregnancy test.
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If you're pregnant, you might get a faintly positive ovulation test that's actually detecting hCG, not LH. This is more likely to be true the further along you are in pregnancy since your levels of hCG in urine will be higher.
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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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Early pregnancy tests are a more sensitive type of urine test. These tests can potentially detect human chorionic gonadotropin (hCG)—the early pregnancy hormone—before your missed period and give you an accurate positive result.