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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
im 19 yrs old i was supposed to get my period the 27 of march but i still have yet to recieve it. Im engaged to my husband to be and WE want so bad to have a baby we have been trying for almost 3yrs and im scared of the thought that i will never have children of my own. please wish me luck....
i have had very bad pains in my lower abdominal area and the same in my lower back, ive been suffering now for over a week, so this morning i done a home pregnancy test and the first 1 had a very very faint line indercating that i was pregnant and at lunch time i did another which say i am not. which will i go by, i am so confused...
I brought three different test. I took about ten test and all of them keep having the evaporation line. its show before three minutes. I don't see how all the test have evaporation lines. Help!!
I brought three different test. I took about ten test and all of them keep having the evaporation line. its show before three minutes. I don't see how all the test have evaporation lines. Help!!
The Start of my last period was March 1.... I Ov on the 13th.. and latley my cycles have been 27 days. I tested yest the 22nd, exactly 5 days from my missed period.
I've been extremely gassy and some cramping last few days. Just feel a little diff. So I wanted to test.
I bought two (Walgreen early response brand) Took one in the evening. A Faint line came up within 2 minutes as a positive, but it was very faint. Figured I take one in the morning with FMU, and like last night same faint line appeared. DH looked at both and see's a line too just very faint.
I'm a tad impatient and tested at work and no line appeared! on a different test (awnser brand)
I know I should just be patient and wait to see more towards the end of the week, I just got a little excitied after yesterday and this a.m, now I'm dissapointed.
Anybody have any bad/good experiance with these brand tests or any feedback at all would help
Thanks!
If the symbol on the pregnancy test comes up negatives, but you can barely see it, is it still a negative?
I was having ovary pain during the week I was ovulating. It was lasting too long, so I went to the OBGYN. He told me that I need a vaginal ultrasound to see what's going on, also rule out IBS. It's been 14 days since I had sex, and haven't really had a huge appetite, I am tired, not drinking much and over analyzing if I am pregnant or not. I took a pregnancy test last night and it was negative, and this am I see a very very faint second line if you look at test in the light, now what? When I was pregnant with my first child, I was three weeks and didn't even know. But, I had same ovary pain like I do know but it didn't last as long as it does this time. I have had a lower back ache and same time leg aches. First child I had no pregnancy symptoms except Nausea for first month. I hate waiting. If a test came back negative can you still see a second line?
i took at test this morning because it is march 19th and my last period was january 29th and the equate ept lines are sopose to be a +/| reading and mine came out like that but the horizontal line in the + was faint and the Vertical line was dark what does that mean
Hi to all of you
I took a pregnancy test last friday and it came out as positve and then in the morning i took another and both test were strongly positive and then i started bleeding this i my first child and we have been waitin for this for 6yrs and nothing happen so after 6days i stop bleeding and then i took another pregnancy test it came out as faint line and then i tryed again and then it was faint so i went to my doctor and they took blood test the result will be in tommorrow so i hope this will be good news for us. i just don't know if i am still pregnant or not . thanks
I'm 12 dpo today (based on OPK). I woke up at 3AM and really had to pee, so since it was technically my first urine of the day I took the test. It was a 6day before missed period kit. The line was really faint. I am assuming I am pregnant and am going to test again in a couple of days. I hope I'm pregnant. I've had tons of symptoms, (almost period like symptoms 2 weeks before my period). Fingers crossed
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