can drinking too much water give you false negative pregnancy test?
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Yes, it's important not to drink too much of any liquid including water or alcohol before you take a pregnancy test. It's better to wait until you naturally need to pass urine. This way, you'll avoid diluting your level of pregnancy hormone and getting a false 'Not Pregnant' result.
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Pregnancy tests used to recommend using your first pee of the morning, when more hCG is present. But now they're sensitive enough that that's not necessary, although it does help if you're taking the test early. Similarly, drinking too much liquid beforehand could dilute your urine and affect the results.
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It's possible to get a negative result from a home pregnancy test when you're actually pregnant. This is known as a false-negative.
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Another common reason for getting a false negative is not having enough hCG in your urine. This may happen if you drank a lot of water, diluting your urine. This may also happen if you took the test later in the day. The hCG concentration is higher when you've held your urine for a while.
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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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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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For the same reason that you should test first thing in the morning, you should also avoid chugging water before taking a pregnancy test. "Drinking water—or any fluids—can, in fact, affect the results of this kind of at-home pregnancy test when very early in the pregnancy.
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Detox your body Drinking unnecessary and excessive amounts of water a few days before the test is not only a waste of time, but also can be extremely harmful to your body. Instead, drink the recommended daily amount of water, two to three liters, during the day of your test.
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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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Getting a false-negative pregnancy test because of the hook effect is rare. False-negative test results can happen for many reasons. One older study that tested 27 different kinds of at-home pregnancy tests found that they gave false negatives almost 48 percent of the time. That's huge!
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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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Not Believing Positive Test Results If you are not pregnant, a false positive pregnancy test result is unlikely. The more likely explanation is that you had a chemical pregnancy (which produces enough hCG to turn a pregnancy test positive but miscarries shortly after) or a very early miscarriage.
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Chemical pregnancy The most common explanation for a "false positive" is that you really were pregnant when you took the test. "Some women can get a positive pregnancy test and then three days after their period is due, they have a really heavy period," says Lanalee Araba Sam, M.D., an ob-gyn in Fort Lauderdale.
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Negative test results If the test result is negative, you may not be pregnant. However, negative results are less reliable. For example, if you do a pregnancy test too early, you could be pregnant, but there may not be enough HCG in your body to give a positive test result.
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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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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. If you get a negative result, you're probably not pregnant.
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Presumably, water will give a negative result (we hope!), but you still can't then add your urine to the strip as well. If you reuse a strip that has gotten wet — either with water or urine and even if it's dried — you may get a false positive. That's because as an HPT dries, an evaporation line can appear.