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Pregnancy Test Faint Lines and Evaporation Lines
The Two Big Pregnancy Test Questions:
1) How Early Can I Test for Pregnancy?
2) What Does a Faint Line Mean on a Pregnancy Test?
How Early Can I Test for Pregnancy?
One question women frequently ask when trying to conceive is: How long do I have to wait before I can take a pregnancy test? Though hCG is produced at different rates in different women, there are general timelines for deciding when to test. However, when testing on the early side, do not rely on one test for conclusive results - especially a negative result: the hCG threshold for displaying a positive result on a home pregnancy test may not yet have been reached.
Early Detection Pregnancy Tests
When a woman becomes pregnant, the amount of hCG in her system should be around 25 mIU at 10 dpo (days past ovulation), 50 mIU at 12 dpo, 100 mIU at around two weeks dpo (these are averages that may deviate among different women). Test sensitivity equates with early-detection - and the lower the number, the sooner a test can detect pregnancy. At 20 MIU test sensitivity, you can begin testing at 7-10 days post ovulation, though the earlier you begin testing, the higher chance you have of getting a false negative. Early-Pregnancy-Tests.com carries early-detection pregnancy tests capable of detecting just 20 miu/ml hcg.
Here, implantation of the fertilized egg needs to take place before hCG is produced by the developing placenta, and that generally occurs at 6-10 dpo. If you decide to test early, make sure you perform a few follow-up tests every other day using first morning urine. Your hCG levels should rise exponentially, doubling every 2 days - which means that the follow up tests should eventually detect pregnancy if you are, in fact, pregnant.
For earliest detection of pregnancy, use first morning urine, as this urine sample contains the most concentrated amount of hCG. If using first morning urine is not feasible, avoiding urination for several hours before using a pregnancy test.
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A faint color band in the test area of a pregnancy test indicates, in most circumstances, a positive result for pregnancy.
However, a faint line appearing after the designated reaction time of the test may be an "evaporation line".
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What Does a Faint Line Mean on a Pregnancy Test?
On a pregnancy test, a faint test line - or color band - is usually indicative of a positive result, as long as it's read within the time frame - or reaction time of the test (usually at 5-10 minutes). If you perform the pregnancy test properly and read results within the recommended time frame, then a faint or weak color band in the test area is very likely a positive pregnancy test.
Evaporation Lines
Evaporation lines, however, can confound results if tests are not interpreted within the clinically recommended time frame. An evaporation line develops when the urine on the test area begins to dry, leaving a faint, usually colorless line. Evaporation lines appear to show up (or not show up) as a result of the composition of the particular urine specimen - and they may appear on any test regardless of brand.
Explanations for Faint Positives
- Testing Too Early: If you test too soon, hCG may not be at a sufficient level for test detection. See the section above on determining when to take a pregnancy test.
- Low Test Sensitivity: Different tests detect hCG at different levels, from 20MIU to 100MIU or more. 20 MIU tests will display a faint line when when hCG levels are at 20 MIU, while less sensitive tests will display a negative result. At 50 MIU levels, a 20 MIU test will show a stronger color band while a 50 MIU test will show a very faint band.
- Dilution of Urine Specimen: Urine specimens may be diluted due to frequent urination or consumption of liquids. First morning urine is recommended for pregnancy testing as it contains the most concentrated presence of hCG.
- Chemical pregnancy: Sometimes an early pregnancy is detected - followed by negative test results. A chemical pregnancy means implantation takes place (hCG is produced for a short time) followed by a miscarriage (generally, before any other pregnancy symptoms are detected).
- Evaporation Lines: Always read your test results within the test reaction time (usually 5 minutes) as evaporation lines can develop as the urine dries on the test area. Evaporation lines appear to show up (or not show up) as a result of the composition of the particular urine specimen - and they may appear on any test regardless of brand.
Remember, a pregnancy test does not function like "light switch" - and just turn on: different hCG levels will produce different gradients of color bands (from very light, faint lines early in pregnancy to dark, rich color lines later on as hCG develops).
Read More About Pregnancy Tests
Comments
i started cramping 2 weeks ago so 2 weeks before my period witch is very unusual for me and also feeling bloated and sick on a night witch i never realy suffer with i have bin trying to conceive for nearly two years now and hope ive succesfully conceived.i also in the past have held up a preggo stick and could see a faint line but to be thruthfull sweetheart you shouldant need to hold it up at the light to c the faint line because this is usually a evaporation line and so if you was pregnant you would see the faint line holding it normally.holding a negative test up to light can cause you to see the line wat would be coloured if you was pregnant but just see the shadow line.i hope i am so wrong and you are but this is what i learned working in a testing laborotary.xxx
i took a line test this morning and the negitive line was clear but where there should be a positive line there two dots kinda looking like they wanna form a line but im not sure and in the negitive line where the positive should be theres and line running thru it but not all nthe way across the screen... the dots are above and the part line is thru the negitive.. am i pregnant.
To the gal who said she had a faint line one day and no line the next day...that happened to me exactly; however, I had bloodwork done, and I was pregnant! So you still may be pregnant. I was told by a healthcare worker that no matter how faint the line, it still means pregnancy.
I'm confused. I've been reading trying to find a similiarity but can't find any. My question is: What does a faint negative line mean? I took the test when i was 6 days late. I took the pregnancy test that shows a "plus" sign for positive and a "negative" sign for a negative test result. The second window just showed a line but that line was very dark and clear. What exactly could this faint negative line mean? Can I rule out pregancy?
I had a very faint line when I was pregnant with my son. When I took the digital test, however, it said I was pregnant. You may have to just sit tight a few days and try again when your hormone levels would be higher if you are pregnant. If you absolutely can't wait, head to the doctor for bloodwork!
I had a faint line on a pregnancy test last night and this morning no hint of a line. Don't freak out, there are many valid reasons (illustrated above) that a faint line might happen. If you are really worried the best thing you can do is go to Planned Parenthood, it's really very affordable and they can give you a definitive pregnancy test and help you sort out your options however your results turn out.
Contrary to what ever other posting on the internet says, a faint line does NOT mean you might be pregnant. Take a deep breath, it will be ok.
I'm suppose to start my period tomorrow but of course have been taking a test the last few days...the digital test say "not pregnant" but the "line" test (as I call them) have a very faint faint faint line! I'm talking like faint! Its almost a shadow??? The girl that works with me keeps looking at it too, she agrees that something was there the minute I walked out of the bathroom & handed it to her! If you turn it a certain way or hold it up in the light you can see a faint line...im soooo confused and anxious! We are trying for our second pregnancy and its so "mind" consuming! Its all I can think about...I've been peeing a lot lately so I really had a good feeling about it but don't know what to do now...I want to take a nother test this afternoon but didn't know if I should just wait until the morning or what? Also I have been cramping some?? any help?????
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