Question about OPKs

Ashley

This is my first cycle using OPKs.

For the past 3 days I've used them, I've had a test line that was visible but not as dark as the control line.

I guess what I'm wondering is whether I'm expected to ovulate soon, or could this be an indicator that my amount of LH is declining post ovulation?

Once you're done ovulating, can you expect to see test lines decreasing in visibility or do they dissappear altogether?