There are a wide variety of pregnancy test kits available online and in store, with the advancement of technology it is as easy as abc! But for some woman its not so easy. Sometimes your test could be wrong. In this blog posts you will find out about how and why this happens. False negatives and false positives few in far between but its best to be clued up.
pregnancy test attempts to determine whether a woman is pregnant. Markers that indicate pregnancy are found in urine and blood, and pregnancy tests require sampling one of these substances. The first of these markers to be discovered, human chorionic gonadotropin (hCG), was discovered in 1930 to be produced by the syncytiotrophoblast cells of the fertilised ova (eggs). While hCG is a reliable marker of pregnancy, it cannot be detected until after implantation: this results in false negatives if the test is performed during the very early stages of pregnancy
False negatives are really bad news especially if you were wanting a baby and go on with a pregnancy and not know your pregnant! or worse yet you could go out drinking for months. A lot of woman take two or three tests just to be sure but as it states on Wikipedia these could all come back negative in the very early stages.
The accuracy of a pregnancy test is most closely related to the day of ovulation, not of the act of intercourse or insemination that caused the pregnancy. It is normal for sperm to live up to five days in the fallopian tubes, waiting for ovulation to occur. It could take up to 12 further days for implantation to occur, meaning even the most sensitive pregnancy tests may give false negatives up to 17 days after the act that caused the pregnancy. Because some home pregnancy tests have high hCG detection thresholds (up to 100 mIU/mL), it may take an additional three or four days for hCG to rise to levels detectable by these tests — meaning false negatives may occur up to three weeks after the act of intercourse or insemination that causes pregnancy.
So there you go woman can walk around not knowing they are pregnant even if they take multiple tests, false negatives in some cases may show up to three weeks. This is how some woman may get dates wrong and or confused especially if they have had a test and go on with their life’s and enter new relationships. This is simply the joy of how implantation works for some woman and no woman should be judged for being irresponsible or becoming pregnant in a bad situation because female fertility is very complex. Some woman get accused of lying to their partners about tests or faking them which in some cases isn’t true at all.
Having a false positive can be a horrible experience for some woman who may become worried about nothing at all. And if you have been taking medication or drugs or have an illness you need to discuss it with your GP as further more accurate tests can be done. This can very upsetting as some woman might have an illness and become very upset if their positive result was due to this and wasn’t correct.
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 blood or protein is present in your urine. And certain drugs, such as tranquilizers, anti-convulsants, or hypnotics, may also cause false-positive results.
Many home pregnancy tests claim to be 99 percent accurate. However, research suggests that many home pregnancy tests are not sensitive enough to diagnose pregnancy in women who have recently missed a period. For the most reliable results, wait to take the test until one week after your missed period.
There are many different ways to do a pregnancy test so choose the one that’s correct for you, if you have ill health talk to a GP or if your trying for a baby research the best ovulation and pregnancy test for yourself online. And remember that there really is never the perfect time to have a baby and in 90 per cent of cases pregnancies are unplanned even married couples can still have a baby unplanned. Unplanned doesn’t mean unwanted.