10.12.2014

Chances of pregnancy tests being wrong

If you are upset by the results of your pregnancy test it is important to keep in mind which factors can affect it.
The results of pregnancy tests may not always state correctly whether or not you are pregnant, that is to say, pregnancy test could be wrong. Although a pregnancy test may give a false positive or false negative, this does not make it wrong in the technical sense. You will notice that many home pregnancy tests make the claim of being 99% accurate on the first day of a missed period.
Most home pregnancy tests are between 97% and 99% accurate but despite this, it is still possible to receive a false positive.
A chemical pregnancy is the term used to describe a miscarriage that occurs very early on in the pregnancy.
When using a home pregnancy test, you should always read the results within a specific time frame that is usually about five minutes. Each home pregnancy test will have specific instructions including how long to wait before reading the test.
There are certain medications that can interfere with the results of home pregnancy tests including hCG therapy (as mentioned above).
Although rare, certain medical conditions may lead to a false positive on your pregnancy test.
It is always possible for you to have purchased a defective pregnancy test although this is extremely rare. Although false positive results tend to be more common than false negatives, it is possible for you to have a false negative on your pregnancy test. As mentioned earlier, pregnancy tests rely on the quantity of hCG in your urine to determine whether you have conceived.
Another possible reason for a false negative is if the sensitivity of your home pregnancy test is too low. Just as reading your pregnancy test too late may give you a false positive, this or even reading it too early can give you a false negative as well. Waiting for the test can seem like hours; although it only takes seconds to see the colors run through the windows. Today, most over-the-counter tests used to confirm pregnancy, measure around 5mcg of HCG, which is extremely scarce. The pinker (or bluer) the line on your test, the higher concentration of HCG you have in your system.


Today I was supposed to start my period but it never came so I went n took a dollar store pregnancy test and the line that came out was perfectly in the middle of the C and the T. I took a test from the dollar tree yesterday , the only reason I took one is because I have been having mood swings like crazy, My back , and people have been point out my stomach I really looked at it last night and it looks like a baby bump ! Many women, for example, will take a pregnancy test before the first day of a missed menstrual cycle and receive an incorrect reading.
Research suggests that they aren’t consistent at detecting pregnancy at this stage but they are reliable when you wait until a week after your missed period and follow the instructions carefully. Home pregnancy tests work by detecting your level of hCG (the pregnancy hormone human chorionic gonadotropin). In this case, the pregnancy test was correct in determining that you successfully conceived but the miscarriage occurred early enough where your menstrual cycle still arrived on time. If you wait too long, you may confuse urine evaporation lines with a positive test line that is faint. It is crucial to always follow these instructions exactly as some tests can produce a faint positive if you wait too long to read the results. Choriocarcinoma and other forms of cancer including testicular, ovarian, or breast cancers may lead to elevated hCG levels and a false positive. In addition, tests become less accurate if they are expired, so always check the expiration date before using your pregnancy test.
If you had a negative result on your pregnancy test and feel like you might be pregnant, consider if one of the following situations applies. This is why you should always test right away in the morning as your hCG levels will be most concentrated at this time. Because inaccurate readings are associated with reading the pregnancy test too early or too late, you should always keep a timer on hand.
It included two tests inside the box, just so you could be doubly sure that the answers are correct. They work by measuring the amount of HCG, which is a pregnancy luteinizing hormone, in your urine. You may have minor amounts of HCG in your system, but the pregnancy is in your fallopian tubes rather than in your uterus.
I went to my local WIC clinic a month after I had my last period and had a pregnancy test done and it came back positive. That means I would be 7 weeks as of this Monday, but yesterday I went and bought a cheap test from the Dollar Tree and took it and it came back negative, but I have all the symptoms of being pregnant.


Learn about all the causes of false pregnancy test so that you could make a better judgment. Although all women naturally have a low amount of this hormone in their urine (and blood), the amount increases exponentially after the embryo is implanted into the uterine wall and it is the resulting high levels that pregnancy tests detect. In fact, some experts believe that among the miscarriages, many of them are chemical pregnancies. These evaporation lines appear as the urine dries, making it important to read the result soon after taking the test. Always use a timer or clock to measure the amount of time since performing the test instead of simply guessing. After that the hCG levels will double every 48 to 72 hours but still won’t reach the levels necessary to be detected by a home test until six or seven days after ovulation. Instead of doing a pregnancy test later on in the day, it is better to wait until the next morning for more accurate results. And had you not taken a test, your menstrual cycle would have started normally and you would have never been the wiser to the pregnancy. Well I went yesterday and bought 2 home pregnancy tests from the Dollar Tree and took them both and they both came back negative. Even after this occurs, it may be another few days before the body begins producing enough hCG, the pregnancy hormone, to be detected. Because the tests are based on hormone readings, it is possible to get a false positive for several reasons. Most women who have a chemical pregnancy don’t even notice unless they are actively trying to conceive. For accurate results, be sure to wait 14 days to test for pregnancy if you had a 10,000 IU injection, ten days for a 5,000 IU injection or seven days for a 2,500 IU injection.
By the same token, you may take a test too early when your pregnancy hormones are just too low to detect through a urine test. Some women feel certain that they know when they ovulate but even in this case, ovulation may vary, leading to false reading on a pregnancy test.



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