Re: Dollar Tree Pregnancy Test - False Pos./Evap Line?
All tests from $ Store to Clear Blue use the same chemicals - some are just more sensitive. They just detect the pregnancy hormone...so if you have it in your system, even a tiny bit, you'll get the positive. I've used the cheap tests since they started selling them and they've never been wrong.
Some false positives are actually pregnancies that didn't take...I believe it's called a chemical pregnancy. But I could swear I saw a line there and one of mine was that faint a week before the really solid one came up.