To start-with, no evaporation line will be coloured (pink or blue etc. Trust me! It depends on the chemical makeup of each woman’s urine. So, if after an hour, or several hours, you have a coloured line in any way, then HCG has been detected – and HCG can only be found in your urine if an egg has been fertilised. An evap line on a pregnancy test means nothing, so it has to be discarded. If the faint line showed up BEFORE the time limit of the test, then it is a positive and you are pregnant. So for those women whereby, unfortunately, fertilisation has occurred, but the pregnancy was not viable, they were pregnant, but the pregnancy stopped. So if the strip remains white or slightly grey – no matter how many hours or days after you did the test - then the strip is simply wet from the urine, but it does not contain any HCG. babyyyy dust!! Do Evap lines disappear?

Indeed, they are attracted to each other by a process known as 'chemotaxis'. Basically I ended up doing 3 pg tests this morning, the first one had a really faint so I did another, that was the same but then 3rd one is barely visible..I'm so confused, going to retest on monday because if I am I've been told I need emergency appointment at st marys for bloods etc sorry for the ramble! Isn’t the elephant in the room with schools the parents mixing at pick up and drop off? That looks like a line to me, looks very pink on my screen. How many presents do you buy for your children. Thank you! I think it does make a lot of sense and hopefully helps people understand more! I have also been trained in the medical micro-biology (lab-testing). And on contact, two different molecules form a 'complex' which changes both it's shape and it's colour – hence the coloured control lines you see in the test areas. I hope it helps, and feedback - whether positive or otherwise - is always useful. I don't know how many dpo I am or anything! I hate evap lines!!!!! I have had false faint lines and definately not been pregnant. Anyone had an evap line on First Response? On any blue dye test, I would always get a faint blue 'positive' line.

Hi ladies, I have a quick question, do evap lines on pg test disappear after a while? I bloody well knew my chemical pregnancy wasn't an evap line! If it's faint, then HCG is present in very low concentration, and if it is a dark coloured line, then the concentration of HCG is higher. awesome, and also very hopeful and inspiring! It's so hard to know! But it wont turn pink or blue. When's the best time to get pregnant? Whether you've just come off the pill, have been trying for a week or a year, or are trying after a miscarriage, you'll find friends here. ? I had 2 neg hpt's, so I don't know whether this one is any different. So let's not have any more if this 'evaporation line' confusion. And now for the famous 'evaporation lines' that so many people – and 'experts' talk about. Join Yahoo Answers and get 100 points today. Evaporation lines are common on pregnancy tests, but they don’t appear every time. I am getting tired and stressful? But if it 's coloured – then HCG is present – in whatever concentration – because only HCG can bring about the colouration of pink/blue, depending on the test you are using. My evaps always stayed. Okay, my faint line on my hpt may mean an evaporation line, but what I want to know is "Do they go away after a while, or do they stay like a real positive line". … GOOD LUCK 2 uuu! Use our interactive ovulation calculator to work out when you're most fertile and most likely to conceive. Mine has been on there for 3 days, and doesn't look like it's going away. I had a false positive after the 10 mins b/c of the evaporation line. This post has put my mind at eAse been getting very faint but BLUE lines on Tesco tests for a couple of days, but doubting myself. However, if you do a test and you get the faintest coloured line in the 'pregnancy' test-strip/assay area on the test, then HCG has definitely been detected. You can sign in to give your opinion on the answer. So then, back to home pregnancy tests ….. This happened perhaps 10 seperate times (different months) and I was never pregnant at any point in those cycles.3 DC down the line I know now to avoid blue dye tests when initially testing for a pregnancy. And in most cases, test-sticks – especially those with caps on – can stay wet for days! What do you think of the answers? I've also had chemical pregnancies. Because tests are typically meant to be read three to five minutes after they are taken, the tests are still damp at the time they are read. I am a clinician and I also have much experience using various tests within laboratories or clinical settings. 2 answer your question no they don't go away as far as I know. Can anyone help? The home pregnancy tests are 'assay' tests which rely on specific reactions between chemicals, to produce coloured lines. Moving on... sometimes fertilisation occurs and HCG is produced for a while, but for some reason, the body detects that the pregnancy will not be successful (not 'viable') and the fertilised egg ceases to continue to divide and develop. And now for the famous 'evaporation lines' that so many people – and 'experts' talk about. How long after getting off birth control did you get pregnant. An evap line (evaporation line) is a faint line that appears after a negative test has dried. I hate evap lines!!!!! The 'control' lines of the home pregnancy tests are assayed areas which are designed to react with specific chemicals commonly found in urine, and which, when detected, react with the chemicals in the control-line assays (strips/areas) and turn them a certain colour (pink or blue depending on the test used). (some tests are more sensitive) If not, use the same brand you got a faint positive with and test again in a day or two, if it was indeed a positive, the line should get darker as the hcg levels get higher... Best of luck! Also, it may still take a couple weeks or so for the 'symptoms of pregnancy' to stop altogether. depending on the test you used). An evaporation line is a slight streak that appears where the positive line on a pregnancy test should be. HCG is only produced when an egg has been fertilised. And indeed, the next tests proved that she was. Very clear on phone screen! If it's slightly grey or remains white – however long after the test you look - then no HCG is present. I've been having lower cramping, tender breasts, peeing all the time and my emotions are all over the place. However, if the right molecules are not present in the urine, then no other molecules can bind to the control molecules – and no colouration will occur – so the test will be 'void' – and another test should be done.

Therefore, even if the HCG levels are virtually undetectable (but present in minute quantities), as the urine travels over the pregnancy-assay, the HCG will still be attracted-to (remember the 'chemotaxis' we talked about earlier) and will bind with the molecules in the pregnancy-assay – hence a positive coloured line showing up to several hours after the test was done.

If you're trying to get pregnant, get support from others doing the same here. Ask the experts from the BEIS and EST here - £100 voucher to be won, Share your tips for removing household stains with Crown - £100 voucher to be won, Talk widget showing discussions of the day & trending threads, Subscribe to Mumsnet emails direct to your inbox. I am critically aware of the intense emotions involved when people are hoping or trying to become pregnant - and I hate to think of the emotional heartache and anxieties that these mixed or uncertain test-results can cause - hence the reason for taking the time to write this short article. Brilliant post isn't it - so what do you make of this? Congrats, Thanks for posting the article and congrats x. bumping this for anyone who is interested! Have you got pics? However, in the event of carrying out a test – and the control lines change colour as they should, then the woman or couple is anxiously waiting (if they wish to have a baby that is) for the 'positive' or 'pregnancy' line to change colour too! Evaps don't have colour to them and tend to appear after about 10 mins x. Superdrug test defiantly looks positive to me, mine looked like that at 10/11dpo with my last pregnancy and I now have a beautiful 11 month old lg. you need to repeat the test if read after 5 mins.personally ive never had one so cant comment.have u missed a period? evaporation lines generally dont have color. I can defiantly see a line, I was so worried when I got my BFP with dd because the line was so faint. If you read your test after the 10 mins then the test is inaccurate.

To use this feature subscribe to Mumsnet Premium - get first access to new features see fewer ads, and support Mumsnet. If you think the line is a faint positive, the best next step is to repeat the pregnancy test. depending on the test you used). This is page 1 of 5 (This thread has 121 messages.). Share with Nintendo - £100 voucher to be won, Do you have questions about the Green Homes Grant?

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