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Periodically, a pregnancy test will yield a false positive, this means that the test shows positive when a person is not actually pregnant. When this happens, it is almost always as a result of user error. Maybe you were flustered or anxious when taking the test and read the result wrong, or maybe you took the test incorrectly. Regardless of the cause, the resulting inconclusive or incorrect test result is probably the last thing you want, especially if the potential pregnancy is unexpected.
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Thankfully, there are some simple things you can do to ensure the accuracy of your at-home pregnancy test results and avoid any test-related confusion or anxiety.
If you had unprotected sex or think you might be pregnant, its tempting to consider taking a pregnancy test before your missed period. Resist the temptation. HCG or Human chorionic gonadotropin is a hormone produced by cells that are surrounding a growing embryo, which eventually forms the placenta after implantation. The elevated presence of hCG is used to signal pregnancy. However, hCG takes time to build up in the body. So, even if implantation of an embryo occurred on a Monday, if you take a pregnancy test on Wednesday, it may still give a negative result.
Dont take a test too earlywait until at least 10 days after a missed period to take a pregnancy test otherwise you might get an inaccurate result. If you think you might be pregnant and already missed your period, wait 3 days and take another test.
If there is hCG in your body, indicating a pregnancy, it will build up in your urine overnight and peak in the morning. Using a pregnancy test first thing in the morning will help you get an accurate result.
Most tests instruct you to hold the test under your urine stream, but this is messy and risks error, like not getting enough urine on the test strip. This method also increases the likelihood of the test falling into the toilet by accident.
Instead, collect your urine in a small, plastic cup and immerse the test strip in the urine for the amount of time indicated in the instructions.
There is a time limit involved in reading an at-home pregnancy testif you read the test outside the window of time outlined in the instructions, you could end up with inaccurate results.
Most non-digital tests show lines to indicate the presence of hCG in the urine. One line will be a control line that shows up no matter what, and the second line typically indicates a pregnancy. If your test is negative, there is a chance you may still see a faint, colorless evaporation line that appears as the urine dries. If you're not familiar with evaporation lines, you might see this line and think you're pregnant.
Avoid letting the test sit too long, otherwise you may read an evaporation line and think you are pregnant.
Likewise, avoid reading your pregnancy test results too early. As your urine travels through the test indicator window, it might look like the results are showing, but the test needs time to completely work.
Follow the tests instructions as closely as possible and avoid checking on the results too early. If needed, set a timer to let you know, according to the instructions, when the results are ready.
Yes, you read that rightpregnancy tests can expire. If you take an expired test, the chemical used in the test may no longer accurately detect the presence of elevated hCG in your body. An expired test can present inaccurate results, so its worth buying a new test to confirm your pregnancy if you have an expired test.
Dont drink too much water, or any liquid, before taking a pregnancy test. Excess fluids can impact the accuracy of the test results, so if your urine is diluted or pale yellow, hold off on taking a test. Diluted urine tends to also have diluted hCG levels which can skew the test results. Take a test when you naturally need to pee. This way, you'll avoid diluting your hCG level and getting a false 'Not Pregnant' result.
Pregnancy tests are typically accurate at signaling a pregnancy. However, you shouldnt rely on those results alone. An ultrasound will confirm the pregnancy and check the early health of the embryo to see if the pregnancy is viablethis assurance is important for women who are experiencing pain or bleeding during pregnancy and those who have had previous miscarriages or ectopic pregnancies.
Visit TheSource.org today to schedule a free pregnancy test or ultrasound to confirm your pregnancy. Our clinic staff is available to help you tackle these early days of pregnancy and give you the support, medical care, and the guidance you need.
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Back in your mom's day, you had to miss your period before you took a pregnancy test and wait a couple of hours before you knew the results. These days you can find out you're expecting much earlier, faster and with better accuracy using home pregnancy tests.
All pregnancy tests measure the same thing: urinary levels of human chorionic gonadotropin (hCG), a placenta-produced hormone of pregnancy. Trusted SourceNational Institutes of HealthPregnancy TestSee All Sources [1] HCG finds its way into your bloodstream and urine almost immediately after an embryo implants in the uterus. However, it does take some time before concentrations are high enough to be detected.
Your best bet is to wait to take a pregnancy test until about 19 days after fertilization in order for hCG to build up to a level thats detectable in your urine. HCG production begins as soon as the embryo implants in your uterus, which is between six to 12 days after fertilization.
As soon as a test can detect hCG, it can show you (depending on the brand) an extra pink line, a blue one, a positive sign or a big digital yes all indicating a positive result.
Can't wait to pee on that stick? Understandably, you're likely wondering how early pregnancy can be detected by a home pregnancy test. Although it'll be hard to wait even a few days to find out whether there's a baby in your future, you may be wasting your money if you try taking a pregnancy test the morning after you hope you conceived.
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While home pregnancy tests are growing ever more sensitive and accurate, there is a limit to how soon a pregnancy test you buy can work. If you test just seven days after ovulation, pregnancy tests generally can't pick up the very low levels of hCG in your urine. That means you'll likely get a "false negative" even if sperm has met egg.
There are, however, some brands of pregnancy tests that claim theyre sensitive enough to detect hCG up to five or six days before your missed period. Still, youll get the most accurate results (and avoid the disappointment of a potential false negative) if you can wait until the day your period is expected.
The details of how you should use a home pregnancy test vary by brand but in general, it's probably the simplest test you'll ever take. To improve accuracy:
It depends on when and how you use them, but some pregnancy tests claim to be up to 99 percent accurate if you follow the instructions although experts say in reality accuracy is closer to 75 percent. A few factors that determine how accurate your home pregnancy test will be:
Some tests can give an accurate result days before you miss your period. But if you wait until the day your period is supposed to start at which point your body is producing enough hCG for the test to more accurately detect it you have a 90 percent chance of the correct result.
In 10 percent of women, implantation doesn't occur until the first day of their missed period, which means they might not get an accurate reading even until they wait until a day or two after they miss their periods.
So with every additional day you wait, there's a better chance you'll have hCG in your system, and the home pregnancy test gets more accurate.
Pregnancy tests used to recommend using your first pee of the morning, when more hCG is present. But now they're sensitive enough to work at any point in the day, 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.
Though different brands show results differently (some with double pink or blue lines, some with a plus or minus sign, some with words like "yes"/"no" or "pregnant"/"not pregnant"), and they range in price, they all work the same way: by detecting levels of the hCG pregnancy hormone in the urine, which begins to appear shortly after implantation.
How much pregnancy tests cost depends on the specific type and brand of home pregnancy test. They usually come in packs of two or three, which cost anywhere from $5 to $25.
Most medications won't affect the accuracy of home pregnancy tests, although fertility drugs containing the hormone hCG are a notable exception. Trusted SourceMayo ClinicHome Pregnancy Tests: Can You Trust the Results?See All Sources [2] If you're not sure, check the package or talk to your doctor.
Yes, you can get both a false positive pregnancy test and a false negative. But false positives are much less common than false negatives. So if your home pregnancy test is positive, it's likely that you're pregnant. Trusted SourceCleveland ClinicPregnancy TestsSee All Sources [3]
If you get a false negative pregnancy test result, it's likely either because you've taken the test too early or you haven't taken it correctly as outlined on the label.
It is possible to get a false positive result on an early pregnancy test before a subsequent test comes back negative. In some cases, that's because very early testing detected a chemical pregnancy an egg that was fertilized but for some reason never implanted. These very early miscarriages are actually extremely common, accounting for around 3 in 4 of all pregnancy losses (and because they happen so early, the vast majority of women whove had one dont even know theyve conceived).
If it turns out that you likely have experienced a very early pregnancy loss, its natural to feel confused or upset. Knowing the odds are in your favor to conceive again and give birth to a healthy baby can help. No matter what, its always best to see your medical practitioner to get a more definitive pregnancy test result.
Your best bet is to visit your health care provider to have your result confirmed by a blood test which measures hCG levels in your blood and can detect pregnancy with nearly 100 percent accuracy. At the same time, you can ask for a complete prenatal checkup. And if your positive pregnancy test is confirmed by your doctor, congratulations!
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