what are the odds of 3 pregnancy tests being wrong?
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Another common reason for getting a false negative is not having enough hCG in the urine you test. Early on in pregnancy, you can dilute the hormone concentration in your urine if you drink a lot of water before testing. This is more likely to happen in very early pregnancy when you take the test later in the day.
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Studies on the packaging of such kits as First Response say 48 percent of women get a "false negative" result when they test three days before their expected period. In other words, the test told nearly half of the women they weren't pregnant when, in fact, they were. ... The front of the First Response box says "Now!
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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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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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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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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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Although many home pregnancy tests claim 99 percent accuracy, they are not perfect. A false-positive result is one where the test indicates that the user is pregnant when she is not. Several factors can lead to a false-positive or a negative reading.
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So what accounts for the price variations among different tests? Some pregnancy tests may be more sensitive to hCG than others. Certain brands might claim that their test can give you an accurate result as early as five to six days before your missed period.
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Drugstore home pregnancy tests claim to be about 99 percent accurate. Pregnancy tests are more accurate when the first urine of the day is used.
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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.
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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.”
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It's rare, but it does happen. A false-positive pregnancy test can be devastating—especially for women who have difficulty conceiving or who are actively trying to get pregnant. ... Thankfully, false-positive pregnancy tests are rare, but they can happen.
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Sometimes a test can also return a false positive result, detecting pregnancy where none exists, but false negative results are much more common, with as many as 9 out of 15 women testing negative until seven or eight weeks.
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Most are over 99 percent accurate once you've missed it, and some brands promise to detect pregnancy hormones in your urine sooner than that. (For example, when you're 3 weeks 5 days pregnant or even 3 weeks 4 days pregnant.)
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The accuracy of a home pregnancy test is 97% if you test after your period is due.
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Urine home pregnancy tests are about 99% accurate. Blood tests are even more accurate.
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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.