Hello! This is my first month using OPK's and I'm on CD 6 (decided to test everyday this month just to get an idea of what to expect). I've noticed I always have faint lines but the last two have also had a thin, dark line at the edge of the test line.
Is this just the dye running and gathering in the indent? Mostly just curious!
Is this just the dye running and gathering in the indent? Mostly just curious!
