what does a thin dark line on OPK mean?

[BunnyN]

I got a line as dark as the control today but it is a thin line. I'm thinking that it is an 'almost positive'? What are your experiences with thin lines?

 

[BunnyN]

anyone?

 

[RandaPanda]

Hmmm, I've never had a thin line but would think it's an almost positive and would start BDing anyway just to be on the safe side. Have you tested again? If so, is the line now darker than the control or thicker?