How Common Is A False Positive Pregnancy Test And What Causes It?
Home Pregnancy Tests
Home pregnancy tests detect Human Chorionic Gonadotropin (hCG), the pregnancy hormone, in a woman’s urine. The easiest way to get an accurate result, when taking a pregnancy test, is to wait until after your period is due. If you just can’t wait, and HAVE to test earlier, the earliest you should take a pregnancy test is usually 4 or 5 days before your period is due. You will need a very sensitive pregnancy tests, if you test this early though. Home tests are usually 97% accurate when all instructions are followed correctly and the results are read on time.
False Positive Pregnancy Test Results and What Causes Them
A false positive pregnancy test is when the test says that you are pregnant but actually you are not. This is a one off case and a positive pregnancy test is a pretty good indication that you are pregnant. False positive pregnancy tests are rare – though there are instances and conditions where they can occur.
There could be various reasons for a false positive test.
A chemical pregnancy is basically an early miscarriage. Research has shown that half of all first pregnancies end in miscarriage. Due to the high sensitivity of home pregnancy tests, many women catch early pregnancies but end up going on to have their periods due to a chemical pregnancy.
Missed Reaction Time
For accuracy in home pregnancy tests it is essential that you read the test results in the stipulated reaction time. If you let the test sit for too long (after the instructions on the box tell you), the test is invalid. This may cause it to show false positive results.
Drugs that have the pregnancy hormone Human Chorionic Gonadotropin (hCG) in them can cause incorrect results in home pregnancy tests. The Human Chorionic Gonadotropin (hCG) in them may be responsible for the false positive pregnancy test. If you have had an HCG shot due to infertilty treatments, you need to be sure the shot is out of your system before you attempt to use early pregnancy tests.
While technically not a true pregnancy, some pregnancy tests leave a faint evaporation line as the urine crosses the test. This faint very light grey evaporation line in the test area is often interpretted as a positive result.
AimStrip pregnancy test strips have a very good reputation of NOT leaving evaporation lines and are much less expensive than brands you can buy in your local supermarket or drug store.
If you are not sure about your home pregnancy results it is recommended that you try again after a couple of days. If doubts regarding the results still persist, you must see a doctor for a pregnancy blood test. A blood test administered by your doctor is more sensitive than the early home tests and can be taken between seven and twelve days after you conceive.