I know with OPKs that the test line has to be as dark or darker than the control line to be positive, but with this test I can't tell since the control line is darker on the edges of the line than in the middle of the line. I have PCOS and I've never been able to get a positive using OPKs before, but I am taking medication and my cycles have become a lot more regular so I thought I would try them again this cycle. this is definitely the darkest test line I have gotten even on this cycle. I actually have a pretty good progression of the lines getting darker each day. I started testing on CD 14 and am now on CD 18. Tell me what you think. Any help is appreciated!