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Early Pregnancy Tests, Very Early Pregnancy Tests Written by: Nancy Wurtzel |
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Pregnancy tests are very accurate these days, and some of the more sensitive ones can even pick up whether you are pregnant from as soon as 7 days after fertilisation has occurred. However testing this early can lead to false results, as sometimes the egg takes longer than 7 days to imbed properly in the uterus and you may get a inaccurate negative reading.
The most reliable time to take a home pregnancy test is after you have missed a period. Waiting until the normal term of a period is over can be a long time if you are desperate to find out if you are pregnant, but the longer you wait the more reliable the results will be. This is because the home tests work by detecting the presence of human Chorionic Gonadotropin (hCG) in your urine, and this is only released in sufficient quantities after the fertilised egg has fully imbedded into the uterus lining, which can take between 6-8 days.
When you carry out a test a home you must ensure you follow the instructions carefully, and try to avoid taking the test after you have drunk a lot of fluids as this can dilute the urine sample and lead to a false reading. Tests are available from pharmacies and supermarkets, but do vary in sensitivity. If you want to test earlier, then look for a home test that states on the box it ranges from at least 20ml/U, which is the most sensitive option. These can be the most expensive tests, so if you are not testing early there is not need to buy this option, so you can get one of the cheaper tests that are around 150ml/U. Testing early with the cheaper tests is not a good idea, as they can fail to detect very low levels of hCG in your urine, and give you a false negative result. Home tests are very reliable if used correctly, with between 97-99% accuracy and make sure you always leave the test for the required length of time before reading, as reading too quickly or too late can give you a false test result. If you can't wait and do test early, then it is a good idea to repeat the test a few days later, just to confirm the results.
If you are concerned with the results from any home tests, or would just prefer your doctor to confirm the pregnancy, then you can request a blood test. Like the home test this will look for the presence of hCG in your body and there are two main types of tests, a 'qualitative hCG test', this just detects whether hCG is in your blood and gives you a straight yes or no answer, or the 'quantitative hCG test' which will measure the amount of hCG in the blood, and can detect very low levels giving you results in the very early stages of pregnancy.
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