I have only used them one month properly before, but I noticed before and after ov the line was a lot fainter, I did one about 5 days and 7 days post ov and although they are not positive, the line is a lot darker. I was looking back at the strips from the month I used them and the lines are so faint straight after ov and even more so a week later.
Could this be a early pregnancy sign or just doesn't mean anything? Are your ov strips very faint after ov ? I am only 7 days post ov so too early to do a pregnancy test