evap line vs faint positive
Fertility TTC Pregnancy

Evap Line VS Faint Positive (Knowing The Difference)

(Evap Line VS Faint Positive) Do you see a second line on your pregnancy test? Don’t get your hopes up yet. Many people have been confused by evaporation lines. If you are looking at a very faint line, there is a possibility you are pregnant or it is just an evap line.  Evaporation lines may appear, and fortunately, they can be avoided. 

Imagine going through fertility treatments, and finally seeing a faint line after two years of trying to conceive only to find out later it was just an evaporation line on a frer. That is what happened to me!

I will answer the following questions.

  • What are evaporation lines?
  • How do evaporation lines look like?
  • How often do evaporation lines occur?
  • What are faint positives?
  • Should I worry about a faint positive pregnancy test?
  • What if I keep getting faint positive pregnancy tests, but I know I am not pregnant?
  • How to take a pregnancy test appropriately?
  • How to differentiate between evap lines and faint positive pregnancy tests?

*Disclosure: I only recommend products I would use myself and all opinions expressed here are our own. This post may contain affiliate links that at no additional cost to you, I may earn a small commission. “

What are evaporation lines?

Evaporation lines are faint lines that appear on pregnancy tests after the urine placed on the pregnancy test dries up and they appear exactly where a positive line would be. This occurs when a chemical reaction takes place in the mother’s urine.

How do evaporation lines look like? What color are evap lines?

You probably already looked up photos of evaporation lines; however, you probably thought it looks exactly like a positive pregnancy test. Surprisingly, they are actually different. Usually, evap lines are colorless lines or streaks (grayish) and a bit thinner than positive lines. Look closer you may be able to figure it out.

Tip: Avoid blue-dyed pregnancy tests; they may give evap lines a blue color. That is why you see many women google “evap line vs faint positive blue dye”. Blue dyes are known to give false positives. If you do take one, try again later and see if it gets darker. 

How often do evaporation lines occur?

Evaporation lines don’t happen all the time. As mentioned previously, evaporation lines are a result of some kind of reaction in the woman’s urine. Some women may see this line a lot while others never. That is because everyone’s urine is unique and composed differently.

What are faint positives?

Faint positives are faint lines that appear on the pregnancy test because of the low amount of HCG present in the urine, but they do indicate that you are pregnant. They have color and are equal in size to the control line.

Sometimes you may get a faint positive because

  • You tested too early.
  • You may have ovulated later than you thought
  • A sign of a chemical pregnancy 
  • The start of a miscarriage – Read this article to help with miscarriage anxiety.
  • The pregnancy test is not sensitive.
  • Your urine is too diluted.

Usually, faint positives are seen within 5 minutes of taking the pregnancy test. However, if you do see a faint positive after 5 minutes you still may be pregnant because low amounts of HCG may take time to appear on pregnancy tests. 

If you choose to test early, make sure you buy a pregnancy test that can detect very low amounts of HCG or you may get a false negative. One of the best pregnancy tests for detecting low HCG is the First Response Early Result Pregnancy Test. It was able to detect HCG as low as 6.5 MIU/ML. If you would like to read more about the best pregnancy tests, click here. 

If you would like to buy a very sensitive pregnancy test that can detect a small amount of HCG, click here. 

Should I worry about a faint positive pregnancy test?

No, you definitely should not worry. You can have a normal pregnancy even if your HCG levels are low. The important thing is that it increases. So, you can take another pregnancy test in 48 hours and see if it gets darker. If it stays faint, there is a possibility of a chemical pregnancy, miscarriage, or ectopic pregnancy. 

*** I am not a doctor. Inform your doctor about faint positive pregnancy tests. 

What if I keep getting a faint positive pregnancy test but I am sure I am not pregnant?

Getting a false positive does occur. It could be for the following reasons:

  • Fertility Medication (Trigger Shot)
  • Hormone Imbalance
  • Molar Pregnancy: An abnormal pregnancy that causes a tumor to grow.
  • Epithelial Cancer Cells and Other Health Problems (Ovarian Cysts)
  • Was recently pregnant, had a miscarriage, an abortion, or a chemical pregnancy, and have leftover HCG.

How to take a pregnancy test appropriately?

  • Choose a sensitive pregnancy test. 
  • Read the instructions on the pregnancy test. Each pregnancy test has its own instructions. 
  • Wait until your miss your period.
  • Use a cup to collect urine.
  • Place the pregnancy test in the cute without letting the urine touch the test line. Leave it in for as many seconds as the pregnancy test says. 
  • Take it out and use a clock to wait. 
  • Don’t read the pregnancy test beyond 5 minutes. Use another pregnancy test when in doubt. 

How to differentiate between evap lines and positive pregnancy tests? (Evap Line VS Faint Positive)

Telling the difference between evap lines and faint positive can be quite difficult. However, this difficulty can be solved by understanding the difference between them.

Evap Lines

  • Appear after the time limit of reading the results of the pregnancy test (usually after 5 minutes).
  • Usually don’t have any color (sometimes they do) and are very faint.
  • It can disappear after a few hours.

Faint Positives

  • Appear within the time limit of readability (usually within 5 minutes).
  • Have dye color (usually pink or blue color).
  • The faint line shows on more than one pregnancy test.
  • A digital pregnancy test says your pregnant. 
  • It will not disappear after a few hours.

evap line vs faint positive

How can you avoid evaporation lines?

  • Read the pregnancy test within 5 minutes.  Read the instructions on the pregnancy test because sometimes pregnancy test results must be read after two minutes.
  • Take another test if confused about whether the line is positive or an evap line. If the same faint line shows on the second pregnancy test, it is most likely a faint positive.
  • Wait until you miss your period by one week.
  • Make sure your urine is concentrated (urine should be dark). Morning urine works best. 
  • Take a digital pregnancy test. it would be much simpler. 
  • Make sure not to wet the test line. Disregard the pregnancy test if you do. 
  • Use a very sensitive pregnancy test. 
  • Buy a group of pregnancy tests from Amazon. I recommend Accumed pregnancy tests because you can take more than one at a time for a very low price and see if they all have a faint line or only one or a few..

If you would like more information, I recommend reading Mama’s Natural “What Does an Evaporation Line on a Pregnancy Test Mean“.

Also, I am very good at differentiating between evaps and postives, so leave a picture of your pregnancy test below, and I will tell you what I think!

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121 Comments
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Cortney
Cortney
17 hours ago

Help

Cortney
Cortney
17 hours ago
Reply to  Cortney

Help

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Cheyenne
Cheyenne
17 hours ago

I’ve been ttc for 3 years and I have pcos. I know to stay away from blue dye but the store I was in DIDNT have any red dye left. I took this at 11 am and it’s 8pm. Yesterday I had a faint line and today it was more noticeable and a tint of blue. I popped the test on the one taken yesterday and it’s hard to see now. Is this an evap or a faint positive ?

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tizmii v.
tizmii v.
17 hours ago

i took this test yesterday and thought i saw something very faint and left it over night and it’s still there… Is this an Evap line?

tizmii v.
tizmii v.
17 hours ago
Reply to  tizmii v.

i’m not sure?

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tizmii v.
tizmii v.
17 hours ago
Reply to  tizmii v.

here’s another pic

tizmii
tizmii
14 hours ago
Reply to  Halimeh Salem

here we go!

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Brittany
Brittany
18 hours ago

Not sure how long it took this line to show up. I pee’d on the stick and control line showed up only so I threw it right away. Hours later while in the bathroom I pulled
It back out to double check and this is what I see. What do you think?

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Brittany
Brittany
17 hours ago
Reply to  Brittany

Ok, just took 2 more and this is the result within 5 minutes. What do you think!?! My husband and I have been trying for 2.5 years btw!

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Emma
Emma
1 day ago

Hi!!! I need help. I took this test. It originally was negative. There was no trace of a second line. However, 3-5 hours later this half line appeared. I’m so confused. I circled it for calcification. It’s only on the bottom half of the test. I also took a pink dye test. This photo was taken an hour after the pink dye test.

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Emma
Emma
1 day ago
Reply to  Halimeh Salem

There’s definitely not a second line on the pink test even hours later however the blue test had a faint half second line hours later originally the blue dye test was negative until I went back later and saw the second line

Mila
Mila
2 days ago

Hi. I need help. I took this test the night before and check the test last night to see one blue line in both test. This morning I re-checked the test to find very faint blue lines. But The last time I had sexual Intercourse was exactly the month ago. So is it a evap line or a positive test.

Mila
Mila
1 day ago
Reply to  Mila

I just took another test( This being my third test) and it’s negative so Im pretty sure its a evap line.

Tristan
Tristan
2 days ago

I need help I cannot tell I am currently 12 days late and i keep track of our inter course and if it going by the last time was April 19th could these be positive????

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Tristan
Tristan
2 days ago
Reply to  Tristan

Here’s another one I took day before

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K leee
K leee
2 days ago

Hello, took a test today but had to take a call during the waiting window, came back about 30 mins later to see this – definitely blue dye in there but was completely white when I left the room. I’ve never seen dye in an evaporation line (I’ve had loads in previous months) but I don’t trust this one as o didn’t read it in the right time limit.

What do you think?

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Meghan
Meghan
2 days ago

Hi there, I stumbled on this post when googling faint positive. I took a test as soon as I woke up this morning (I am not due for my period until Sunday) and got a faint line. However, later in the day I took some dollar store tests – all negative.
I’d love to know what you think of this

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Meghan
Meghan
2 days ago
Reply to  Halimeh Salem

Thank you so much for the reply!!! This test is a early detection test from the drug store (I am in Canada, it’s a life brand test – the “no name” version of a first response)
I do have one dollar store test that I was going to test with tomorrow morning just to see.
If it’s a negative, I will buy an early response 🙂 I will keep you updated

Myra
Myra
3 days ago

I took this test looked negative so I let it sit there for a few hours came back and saw that it looked like this. Is this an evap? I’m 1 day late today, I took the test yesterday. I tested again today but got a negative for sure this time.

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Taylor
Taylor
3 days ago

Hi what do you guys think? Thought it was negative this morning looked in trash 2 hours later and seen this?

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Kelly
Kelly
4 days ago

Hi Halimeh!
I took this test last night and woke up this morning to see the line has darken. It was faint about 10 minutes after my test. I didn’t know if these were evaporation lines. I’m a day late but have been abnormally bloated and my breasts have a different tenderness than usual.

Thank you in advance 🙂

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Ellen
Ellen
5 days ago

I took a test this morning after being 1 week late. I see a faint line but I can’t tell if it’s a postive?? help please❤️

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Ellen
Ellen
5 days ago

I can’t tell if this is a postive or not?? help please❤️

Iliana Louiseze
Iliana Louiseze
5 days ago

I took this today and right away it read this was wondering if it’s evaporation line I will be testing tomorrow again

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Jessica
Jessica
5 days ago

Took this test this morning. 1wk late on my period. Evaporated or faint positive.

katie
6 days ago

I took 3 clear blue test, one came up with a dark blue line, one wAs a very faint but coloured line, and then one was negative.
I’m confused, I’m only 4 days past expected period, I’ve been getting cramps, headache and acid reflux.
I’ll test ago with a different test 7 days after missed period but I was to know your thoughts

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katie
6 days ago
Reply to  Halimeh Salem

I took two one day, 1 being the light line and then 2nd being the darker line.
Then I took the 3rd this morning and was nothing.

Axie
Axie
7 days ago

This has now been sitting for a few hours, and it was faint earlier. But I read where an evap line would disappear and this has gotten darker. What do you think?! Thank you in advance!!! Praying this is baby 2!!

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Kayana
Kayana
8 days ago

Do you think this could be evap line or positive?

Shelby
Shelby
9 days ago

I’m not sure if I am testing to early or if it’s an evap line. Not sure if my period is late or not because it’s very irregular.

Shelby
Shelby
9 days ago
Reply to  Halimeh Salem

I took a pink test this morning and I’m pretty sure it read negative.

Shelby
Shelby
9 days ago
Reply to  Shelby

It shows one line very clearly and it looks negative but held up to the light you can see a very faint line but I feel like I might be imagining it as well. Think I’ll wait a few days or another week and retest with pink again

Katelyn Minarich
Katelyn Minarich
9 days ago

What do u think about this test? It came up within the 3-5 minutes and it’s been a couple hrs and it still looks the same

Katelyn Minarich
Katelyn Minarich
9 days ago

Here’s the test

Katelyn Minarich
Katelyn Minarich
9 days ago

*

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Taylor
Taylor
9 days ago

Please tell me this is an Evap line on the blue? I see nothing on the link. I have a 2 year old and 10 months old I’m scared 🤣😅

Ashley K
Ashley K
10 days ago

Can you tell me if these are faint positives or evap lines? They are taken 1 day apart.

Ashley K
Ashley K
9 days ago
Reply to  Ashley K

Photo attached.

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Ashley K
Ashley K
9 days ago
Reply to  Ashley K

Blue dye test was taken 1 day before pink dye test.

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Tina
Tina
11 days ago

Very educating

Sama Jehad
Sama Jehad
11 days ago

Thank you! this is very helpful! I will share my test result when I try again next month

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Crystal
Crystal
11 days ago
Reply to  Halimeh Salem

Your thoughts? I can’t see them.

Crystal
Crystal
11 days ago
Reply to  Halimeh Salem

Thank you. Do you think I should get a test with pink dye as opposed to blue?

Crystal
Crystal
11 days ago
Reply to  Halimeh Salem

Awesome! Bought a 3 pack. Plan to test over the next 3 mornings. (Fingers crossed)

Crystal
Crystal
11 days ago
Reply to  Halimeh Salem

Thank you sooo much 🤞🏼💕

Crystal
Crystal
11 days ago
Reply to  Halimeh Salem

Just sent another pic via email. Let me know you’re thoughts on this mornings test. Faint positive? Or evap? Within the 3-5 mark.