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I took a preg test last Thursday (I had a very quick period 3 weeks ago) It came up with a very pale line (Very pale pink) It being very faint ruled out me being pregnant last month but has gotten my hopes up for this month. (I have all the symptoms but they could also be pms symptons as well) I took a diffrent test yesterday and no lines showed up (That test wasn't as sensitive as the first that one was 3 - 4 days before the other was 5 - 7 days) I took the original brand test again today and within a min a very faint pink line showed up again. It was no darker then a week ago. Has anyone else had this happen to them and they weren't pregnant? Is it a shadow line I have heard of? or can an evaporation line show up within the 5 min window?

2007-03-27 16:16:29 · 3 answers · asked by Anonymous in Pregnancy & Parenting Trying to Conceive

3 answers

What's an evaporation line? Evaporation ("evap") lines result with the test's antibody strip just looks slightly different than the space around it. There is a line of antibodies (usually made from mouse cells) in the Control and Test section. The Control line binds with any liquid and turns pink (or blue, in tests using blue dye.) The Test/Result line turns pink only if pregnancy hormone is detected. If not, the moisture passes over this strip and does not turn pink. It may, however, become more visible when the light hits the moisture on the strip-- it may appear gray, colorless, like a "dent" in the test, or like a "ghost line." It may appear at any time-- as soon as the urine hits it, after a few minutes as the test absorbs the moisture, or after the 10-minute time limit. It may appear when the test is drying, or after it has dried. It may disappear as the test is drying, or after the test has dried, or not disappear at all.

The simple fact is that there is always "something there" that is slightly visible-- it's simply the antibodies on the test that would turn pink in the presence of hCG. When the test becomes wet, or as it dries, or after it dries, the antibody strip may become more visible. Therefore, all tests may have them. It is not a defect; it's just how tests are made.

A real positive is identified by its color (pink or blue, whatever the color of the test's dye is) and its appearance within 10 minutes of urinating on the stick. A line that appears after 10 minutes, regardless of color, must be considered an evap line and is caused by the test's chemicals changing. HPT's are rapid assay diagnostics, which means any results appearing after the "rapid" time limit of 10 minutes are invalid
http://www.peeonastick.com

I think you are pregnant myself. Good luck!

2007-03-27 18:52:40 · answer #1 · answered by ஐ♥Julian'sMommy♥ஐ 7 · 0 0

blood test are defiantly the best. i had the same problem with those test that use lines the lines were so faint i could not read it so i brought a digital test it was so much better i would highly recommend them over the ones with the lines

2007-03-28 00:24:47 · answer #2 · answered by Anonymous · 0 0

Stop guessing and get a blood test to be sure..

2007-03-27 23:37:12 · answer #3 · answered by December 4 · 0 0

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