Posting this for a friend. Back story: Husband had a vasectomy, he went in for the first shooters test but not the 2nd. She tested because (her periods are irregular) she had dark brown spotting on Friday and used a tampon, after 8 hours there was barely anything on it and nothing since. We all know blue dyes suck but it's what she had.. she will test again in the morning with the other blue dye she had then if that is inconclusive will buy a FRER. What are the chances this is a true positive?
I had a very convincing blue dye false positive last month...so I would never trust a blue dye positive unless it was blazing positive.
I think the general rule with blue dye is that if the line is as thick (not necessary as dark) as the control line then it is likely to be a positive. I could be wrong though...
In this case it's very difficult to see the thickness of the line...I hope she gets the result she wants though
I would not judge anything by that test. I thought I saw something at first, and now I don't... tell her to test again without blue dye!
Mara & Joel, 2009
I've had a blue dye look like that and I wasn't pregnant, so I wouldn't go by that at all.
ETA: I've had plenty of periods where I start spotting brown, and it can be a couple days later before I really start it or get anything else. So that can be normal too.