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?

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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.
 Faint Line
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".
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
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Comments

What Does The One Straight Line On A Pregnancy Test Mean

PLEASE HELP . I had sex September 25th , my period has not yet came but it usually comes during the middle or end of the month . I'm really nervous , and I took a pregnancy test yesterday and it said negative . However, the negative sign wasnt a dark blue line , it was more faint . Does this mean I'm pregnant . If you know any helpful information email me at rosabella212@yahoo.com .

M jus 19 m i pregnant ot not i missed my days since 2months
But i checkd my pregnancy vd 2 kits one with prega news and other d
With i can but in both the T line was very light and
C was dark

Hi just wondering if someone can give me some advise please. I had taken a cheap pregnancy test 2 days ago, within 10-15 mins I had a very weak line, I bought myself a clear blue digital the same day to try and put dates together but when I tested it stated not pregnant. I have repeated this morning with a cheaper test, and at 1st I thought it was negative, but 1 hour later I checked and looked just as i was thowing it away there was this little faint ( with a slight colour ) line. (confused)

Hello ladies, i was hoping some one could help me out. Okay i have a 30 day cycle nd i ovulate on the 9th nd get my period on the 17th.

Its now 8dpo and im already 2 days late. Last night a i did a HPT and got a BFN!

question : is it too really yet because of my cycle ?

And if so when should i test?

I took a first response got a neg then looked at it a few hours and seen a real faint line someone please help could I be pregnant

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You certainly realize how to bring a problem to light
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hello yall I would like to know if I could be pregnant. I took a pregnancy test and it showed a pink line and a faint line then hrs later i looked at it again to show it to my fiance and the line appeared darker. Could I be pregnant?

Okey so... I had sex with my partner a lot last month everyday without protection, and now I have been having period cramps without an actuall period and it is also late, I have really sore boobs to but that's all, I took a test and it came up negative but later on when I looked it had a very faint second line?, can anyone help me?

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