why can pregnacie test change after 10 mints has any one have had that happend before?

Question

I am not doing a report here so i can spell how ever the @@@@ i want

Answer 1

Its because the pregnancy tests measure a specific hormone. And if you read the Test after 10 minutes, the stick has longer to soak in MORE of the hormone, and therfore sometimes gives you a FALSE positive. You should ONLY look at the pregnancy test within 2-5 minutes of dipping it in your urine, as after that it may not be as accurate.

Answer 2

Ok, I had experienced this first hand. I took a pregnancy test and went downstairs to watch a movie with friends (I told them I didn't take it yet). When the movie was over and they left I went up to check it and saw two lines. So I read the FAQ
(frequently asked questions). It said that it doesn't matter how light the line is, if there are two lines ur pregnant. The second answer said that if you do not check the results within the first 10 minutes a line may start to appear.
So of course I freaked out!
Oh and btw I was pregnant! lol
That should have been at the start of the directions not the end in smaller print!!!!!

Answer 3

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

Answer 4

Yes, this happened to me. I think it was because the hormones were just starting to get to a high enough level, but I'm not a doctor, so I really don't know. All I know is that after an hour, I went back to go to the bathroom and the test was still sitting there, only this time with 2 lines. I bought several more and took them over the next 3 days, and each day they would more quickly turn dark and show both lines.

Answer 5

Usually, you get an evaporation line* after that time, which can be construed as a false positive result.

*An evaporation line is a faint shadow left behind when the urine evaporates. Because it's a line, many women think it's the second blue/pink line (even though it's not really pink or blue) that indicates a positive result.

Answer 6

No. And it's spelled PREGNANCY, MINUTES, AND HAPPENED.