Evaporation lines on pregnancy tests are generally colorless, but not always. There are some evaporation lines that do have color—either a light blue or light pink. The color, however, is very faint and not as dark as the color of the control line. The evaporation line can also sometimes appear greyish.
How do you tell if it’s an EVAP line or positive?
An evaporation line is a slight streak that appears where the positive line on a pregnancy test should be. Evaporation lines are colorless streaks, not faint lines. They typically appear if a person waits for longer than the suggested time to read the test result.
What does an evaporation line look like on a pregnancy test?
Evaporation lines are common and can occur with any pregnancy test. An evaporation line is a line that appears in the results window of a pregnancy test as the urine dries. It can leave a faint, colorless line. If you’re not familiar with evaporation lines, you might see this line and think you’re pregnant.
Do pink dye tests have EVAP lines?
Many people believe that, compared to their blue counterparts, pink dye tests are less prone to getting an evaporation line. This faint, colorless line can make reading a result more confusing, and deceive someone into thinking they have a positive result, when, in fact, the test is negative.
How long does a evaporation line stay on a pregnancy test?
The instructions on most pregnancy tests will advise you to read the results within a certain window of time. This usually ranges between a couple of minutes up until 10 minutes later. If you see a positive result beyond this time frame, you may be left second-guessing the results.
How faint Can a pregnancy line be?
Any positive line, no matter how faint, means your result is pregnant. Levels of hCG in your body will increase over the course of your pregnancy. If you test early, your hCG levels may be still be low and you’ll see a faint positive line.
What does a very faint positive line mean?
If you check your results within the recommended time frame and see a faint positive line, you’re most likely pregnant. On the other hand, if you miss the window for checking the results and you don’t check the test until 10 minutes later, a faint line may be an evaporation line, which means you’re not pregnant.
Can you see evaporation line immediately pregnancy test?
Then it’s probably an evaporation line. When did the line show up? If a pink line showed up quickly, then it is likely a positive, pregnant result. If the line only showed up much later (say ten minutes or more) than the control line, it may be an evaporation line.
Can an evaporation line show up within the time limit?
Some women may see an evaporation line after five minutes while for others, this line may appear in an hour or so. An evaporation line does not indicate pregnancy and is merely a result of evaporation. Do not make the mistake of considering this a faint positive line.
Why can’t you read a pregnancy test after 10 minutes?
The reason for this is due to the urine evaporating if left for too long; it can leave a faint line which can be mistaken as a positive test. It is recommended to not read a pregnancy test after the recommended time frame (10 minutes) as most brands have a possibility of evaporation lines.”
Do blue dye tests give false positives?
Blue dye tests are notorious for false positives. In other words, you may test and see a blue + symbol, but not actually be pregnant. … Pink dye tests are more reliable and false positives are extremely rare. My preferred pink dye test is the First Response Early Result (FRER).
What pregnancy tests detect the lowest amount of hCG?
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.
What happens if you pee on the pregnancy test window?
Why you might get false positive
Follow-up blood tests will be able to tell whether your hormone levels are dropping or rising. Sometimes an ‘evaporation line’ can appear on a test as urine dries in the test window, and some women may confuse it for a very faint second line.
Why do you have to wait 3 minutes for a pregnancy test?
The tests ability to detect HCG hormone will be higher allowing an earlier positive result if you are pregnant. Usually the tests recommend waiting about 3 minutes before reading it. … Because of this predictable rise in HCG, a home pregnancy test will be accurate about 7-10 days after conception.
Can a pregnancy test be negative one day and positive the next?
Some women get a negative test, and then later test positive for pregnancy. If this happens, believe the positive test. That’s because HCG levels take a while to rise, and the positive test may be because they’re finally high enough for a test to register.
What if pregnancy test shows no lines?
If there’s no line or positive result, it doesn’t necessarily mean you’re not pregnant (though that is a possibility). Instead, it could simply mean that there’s not yet enough human chorionic gonadotropin (hCG), the hormone produced by cells that will become the placenta after implantation, to be detected by the test.