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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
To the person who posted below - one of your tests probably came out negative because you mentioned that you drank a lot of water before it, therefore diluting your pee and giving you the negative result.
I'm super anxious during my 2ww .. first time trying to conceive and I've been reading tons of forums to pass the time (some of them really freak me out !) but hoping for sticky baby dust!
hey people, i was the one who was asking about the 1 faint positive and 1 digital "not pregnant" (who was nearly 18) and just 2 let you's no, im pregnant. i waited another 2days and sure enuf another 2 tests came back + and "pregnant 1-2" so id say be patient. iv decided 2 keep it 2. wish me luck
i hope you get the answers what you's are hoping 4. x
Im going threw the samething.. One test has a faint pink line and the one i took this am reads negative..so what is the real result? Anyone out there had this happen to them?and wat was the out come of it all please let me know...
ok i had my period july 7 - july 13 i was suppose to start my period july 31, (25 day cycle) i started aug 2, (27 daycycle) ive taken soooo many test they all say NEG! im on my second day of my period! i just took a fertility test for women an yeah lol im soo not understanding this test....it says normal FSH either one line or two lines but the one is faint, thats what mine is ( two lines one is faint) under it says continue trying to conceive! ((confusing)) anyways, i have no clue when ovulation starts again my period was july 7, 10 we had sex july, 8, 9, 12, 13, 14, 15,16, 18, 19, 20, 22, 24, 26, 28, 29, THATS ALOT! haha, but how could i not be preg. last month was the same we missed one whole week which was my period week no sex! before an after that it was on lol...so idk i just dont understand this pos. test neg test. fertility, ovulation, its all crazy lol...
I CAME ON MY PERIOD BUT IT WAS JUST FOR 3 DAYS AND I TOOK A PREGNANCY TEST AND IT CAME OUT POSITIVE WITH 2 DARK BLUE LINE AND I AM GOING TO SAVE A LIFE TOMORROW CAUSE THEY SAY THESE TEST ARE NEVER WRONG !!!!!!!BUT IF I AM IM GOING TO TAKE CARE OF MY CHILD AND IM NOT SCARED CAUSE IT HAPPENS FOR A REASON
I think that I might be pregnant, but the test that I just took came out negative. i have been eating cinnamon doughnuts a lot (do not even want to consider iced doughnuts which are usually my favourite) and can only stand the thought of lemonade as a fizzy drink when it used to be my least favourite. My nipples are also quite sore and sensitive and my husband has said that my breasts seem a little bigger. I also feel a bit sick first thing in the morning and when I go to bed at night, and I get quite tired during the day. We had sex on the 9th of July and my period was due on the 14th of July. When it came it was not very much like usual, it started with a bit of brown then 3 days of light blood flow and finished with a couple of spots on my underwear. I could have gone through the whole time using just 2 normal pads. We have since been having sex quite a lot. I was on the pill up until late June/early July so I am usually very regular. Could coming off the pill be affecting all these changes or is it possible that the test was too early? I never used to get sore breasts before I started taking the pill. So could my "period" have been implantation? I have never been pregnant before so I do not know what to expect.
I found out I was pregnant at the end of May, a couple of days before I was due to travel to the US for the summer. I made a rash decision and had a termination over here in the States. As I was only 5 weeks gone, I was able to have the pill method, so I bled for two weeks following this ( obviously making you miscarray). Ive been having sex since but they started me on a different birth control pill. I had a follow up test to confirm I was no longer pregnant. Since then I have missed two periods( the first one following the termination was like blotting..I thought I was coming on..light bleeding for a day then nothing). I fainted the other day, Ive been sick and Im just sleeping all day. So I took a test and it was negative..so I dont know whats going on..is this as a result of my termination or am I pregnant again?I was told to use extra precautions incl the pill straight after the termination but didnt, as I really regret my decision..wht do you think?
ok... i took a hpt after work like 45 min ago and it had a medium in darkenss, pinkish color FAINT line. problrm is, my fertility chart shows ovulation occured on sunday...... any advice helps
i was to start on july 2nd. After a week late i took 3 tests all positives. Next week I spotted for a day and then took another test out of concern and it was negative. ???,i, went to ob to get blood work done and results came back negative. Im now 4 weeks late bloated with tender breasts... What do i do?
i used a clear blue +/- pregnancy test yesterday and it was a really faint positive , i was confused so i drank loads so i would go again a few hours later. This time i used a clear blue digital pregnancy test, and it came up "not pregnant" im really confused, am i pregnant or not ? FYI im nearly 18 in a few weeks,(so pretty young but dont judge me
) so id really appreciate it if you'd let me no :/
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