No surprised that I got another flashing, opk is lighter too so I'm guessing my surge is over if that's what it is. The picture shows you the difference in accuracies with cb one. Safe to say I'm never buying it again!!
I'm sure when you read more into it the line closest to where you pee gets darker as it detects more lh and the other one detects estrogen and gets lighter the more estrogen you have. I don't think they work in the same way as an ic opk.
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