do the early detection pregnancy tests work?
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Many home pregnancy tests claim to be accurate as early as the first day of a missed period — or even before. You're likely to get more accurate results, however, if you wait until after the first day of your missed period.
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In 79% of the samples tested in a laboratory study, pregnancy was detected 6 days before the missed period (which is 5 days before the expected period). > 99% accurate at detecting pregnancy from the day of the expected period. A pregnant result may appear in 1 minute when testing from the day of the missed period.
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Some early detection pregnancy tests can be used earlier than that. Drugstore home pregnancy tests claim to be about 99 percent accurate. Pregnancy tests are more accurate when the first urine of the day is used. Your pregnancy test won't be very accurate if it has expired, so it's important to check the expiry date.
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As what happened with New_here above, a pregnancy may initially be detected by an early pregnancy test, which will give you a positive result. But then, when you test again at a later time, you get a negative result.
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False positives can also occur, but they're rare. Testing very early could detect a chemical pregnancy, where a fertilized egg implants in the uterus but stops growing before it's big enough to see on an early ultrasound.
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Cons of Early Pregnancy Tests The package insert for one of the leading brands of early pregnancy tests states that, when used five days before the expected menstrual period, the test will detect hCG in about 76% of pregnant women.
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One kit, the First Response Early Result Pregnancy Test, emerged as the most reliable and sensitive test. "It detected hCG at concentrations as low as 6.5 mIU/ml (thousandths of an International Unit per milliliter) - that's almost sensitive enough to detect any pregnancy soon after implantation," CR wrote.
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If you've taken an early pregnancy detection test at home, you may have got a positive result but not experienced any symptoms. Early pregnancy detection strips measure the level of hCG in the urine to determine pregnancy. The level of hCG hormone is very low during the early stages.
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Currently, pregnancy tests that give positive results earliest are the Clearblue Early Detection pregnancy test and the First Response Early Response, both of which can be taken 5 days before your period is due.
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All home pregnancy tests are up to 99 percent accurate if you follow the instructions. That's just as reliable as the urine pregnancy tests used at doctors' offices. The key is taking the test at the right time. ... Testing too early in your cycle before enough hCG has built up in your urine could lead to a false negative.
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Clearblue® Rapid Detection Pregnancy Test can be used as early as 4 days before you expect your period (which is 5 days sooner than your missed period). If you test before your expected period and get a 'Not Pregnant' (negative) result, there is still a chance that you may be pregnant.
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If a Clearblue Pregnancy Test is used on the day of the expected period, it is more than 99% accurate at detecting pregnancy. The high sensitivity of the Clearblue Early Detection Pregnancy Test means that pregnancy can be detected up to 6 days before the missed period.
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The Answer one step quick and simple pregnancy test has been clinically proven to be over 99 percent accurate at detecting levels of the pregnancy hormone from the day of your missed period.
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Clearblue® Rapid Detection Pregnancy Test can be used as early as 5 days before your missed period (which is 4 days before you expect your period to start). If you test before your expected period and get a 'Not Pregnant' (negative) result, there is still a chance that you may be pregnant.
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The FIRST RESPONSE™ Early Result Pregnancy Test is designed to detect hCG (human chorionic gonadotropin) as early 6 days before your missed period (5 days before day of the expected period). You can use the test at any time of day.
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Testing too early is unreliable as it can lead to a false result. If it's negative, it doesn't mean that you aren't pregnant—it could just be too early to tell.
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Clearblue Early Detection Pregnancy Test can tell you 6 days sooner than your missed period (which is 5 days before your expected period)1. No matter when you test, you can be confident in the accuracy of a 'Pregnant' result with any Clearblue Pregnancy Test.