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

I had a stillborn 2months ago and my boyfriend and I have been try to get pregnant again. I took a hpt last Wednesday and it was pos+ but it was after the 5mins that it showed up. I took another this morning and it was neg-. I haven't gotten my period. So could I be pregnant?

HELW IM CELIA ND IM 19 YEARS. I HAV BEEN HAVIN UNPROTECTD SEX WITH MY BOYFRIEND FOR THE PAST 9 MONTHS ND ON THE LAST WEEK ON D19 OF AUGUST AFTA 2 WEEKS HAVIN MA PEROID I RECOGNICE A LIL BRWN BLOOD ON MA UNDER WEAR SO I THOUGHT I WAZ GOIN 2 EXPERIANCE ANOTHER PEROIDS BUT THEY NEVA APPEARE SO ON THE 12 OF SEPTEMBER I BOUGHT A PREG TEST ND THE WERE TWO LINES ,WHICH WAZ D CLEAR ONE ND D FAINT ONE WIL I HAV ANY POSSIBILITIES THAT I MIGHT B PREGNACT ND IM ALWAYS TIRD ND I HAV STOMACH CRAMPS PLZ HELP IT WIL MEAN A LOT

HELW IM CELIA ND IM 19 YEARS. I HAV BEEN HAVIN UNPROTECTD SEX WITH MY BOYFRIEND FOR THE PAST 9 MONTHS ND ON THE LAST WEEK ON D19 OF AUGUST AFTA 2 WEEKS HAVIN MA PEROID I RECOGNICE A LIL BRWN BLOOD ON MA UNDER WEAR SO I THOUGHT I WAZ GOIN 2 EXPERIANCE ANOTHER PEROIDS BUT THEY NEVA APPEARE SO ON THE 12 OF SEPTEMBER I BOUGHT A PREG TEST ND THE WERE TWO LINES ,WHICH WAZ D CLEAR ONE ND D FAINT ONE WIL I HAV ANY POSSIBILITIES THAT I MIGHT B PREGNACT ND IM ALWAYS TIRD ND I HAV STOMACH CRAMPS PLZ HELP IT WIL MEAN A LOT

help me! I'm on the seasonique birth control and NEVER miss a pill. i only get my period every three months so i randomly take a pregnancy test to reassure myself. I took one today and the control line showed up just fine immediately, the right color and everything. the result line showed negative but it was extremely light in color. What does this mean? help please!

OK, so i had a misscarriage at the end of may 2011 i then had a normal period after everything happened (july 19th) i have missed my august period and i tested this morning which showed a Clear line and one faint like then got dark more noticable but not as intense as other line on a rate id say faint like about 6/10(would be easier to post a picture), i do have symptoms of pregnancy eg; feeling sick, tender breasts, tiredness, bloated,gassy etc. Can someone please help??!!??!! .. if youd like a picture uploaded of the test let me know i can give u my email address.

hi i have just done two pregnancy test and theys a line then a faint line on both test what does this mean ?

I havent had a period since feb 7th, withdrawal bleed from finishing b/c anyway in june 16th I had 1 day of light bleeding and then brown discharge which lasted until august 7. Have been having unprotected sex with my boyfriend this whole time. Taken numerous hpt's over the months and all have been negative. Took one at 12 noon today a clearblue and there was a thin faint line making it read + after the 10 mins the line got darker and more noticble. Am I pregnant or could it be an evapouration line? Symptoms this week, period like cramps, pain in vagina, constipated, gassy and very sensitive nipples.

ok my name is amanda and i took a home hcg pregnancy test and at first it came out negative and then 2 days it wuz positive i freaked oot so i told my mom so we bought another hcg pregnancy test and that one came out negative and it still is...but the positve pregnancy test it is positve but the line is reali faint i have to look up real close too see it but its positve and im sure of that am i pregnant or is it all in my head???im only 15 years old and im kinda scared cuz me and my boyfreind aint reali ready for a baby but ppl always told me it dont matter if it takes weeks for a test too come positve and it dont matter how dark and faint the second line is soo can somebody please help me and tell me pleae!!!

hey my name is bubbles,i took a hcg pregnancy test and at first it came out negative and then 2 days later it wuz positve i freaked out so i told my mom so we went to the store and bought another hcg pregnancy test and that one came out negative and it still is...but the positve one it is positve but the other line is reali faint i have to look up close to see it can somebody please help me out here im only 15 years old and im scared cuz i never had a positve pregnancy test never so somebody help me pleae!!!

hi everyone plz help me i took a hpt 4 days before peiods due but it was neg. i looked at it again in the morning and it had another line but it was from the dollor store and the line was in a weird spot on the other side of the neg. line what does this mean i been having pinkish blood that turned brown then spots of red then gone idk whats going on i need help im 17 years old

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