For 3 days now my line has been getting darker on the opk, my stick also looks different for the last 2 days even more so this morning on the CBFM but still says high.
I took another opk with SMU and it looks darker than the control line!
The cheapies seem to have worked for me and I find them easy to read, but it's nice with the CBFM testing just once a day and knowing the extra fertile high days as well.
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