Blue dye tests...

So blue dye tests sometimes turn out neg when they're supposed to be positive or what's so bad about them? I'm hearing pink dye tests are more accurate? Do pink tests detect more early on or? TIA. -Confused.

I think they give evap lines more giving the illusion of false positives.

Quoting Ladee+Grant+Lilly:" I think they give evap lines more giving the illusion of false positives."

Okay, but if it's negative without that second line, then it's correct/accurate?

I found this, maybe it will help?

http://voices.yahoo.com/why-women-avoid-blue-dye-pregnancy-tests-10266871.html

Quoting Ladee+Grant+Lilly:" I found this, maybe it will help? http://voices.yahoo.com/why-women-avoid-blue-dye-pregnancy-tests-10266871.html"

Thanks. This does help  

I took 2 blue dye tests earlier this week, 7 days after my period ended so obviously it would not be positive. Both of them had a thin faint line. I took a test from our lab at work and it was totally negative. Blue dye tests suck.

Quoting Colt's mommy:" I took 2 blue dye tests earlier this week, 7 days after my period ended so obviously it would not be ... [snip!] ... Both of them had a thin faint line. I took a test from our lab at work and it was totally negative. Blue dye tests suck."

Apparently. I'm going to call my doctor Monday morning since I'm off.