First time using opk strips... help?

Nicole

I know the test line is supposed to be as dark as or darker than the control line. The two tests on the bottom look close but not quite there to me (2nd to bottom taken at 6am today, bottom one taken at 3:30pm today). Although if you look at them closely, the left side of the test lines are just as dark as the control, at least to me.

What does this mean? I will keep testing and BDing for the next couple days, but I’d love to hear opinions on what these tests look like to you