Originally Posted by
atomic sagebrush
You don't know if it's a false peak or not. You know when AF arrives and you remember back 14 days or so (hoping that your LP was actually 14 days LOL)
I agree a sucky system but it's all we have.
Using OPK for cutoff is a dicey business anyway for the exact reasons you mention. Most people going for cutoffs try to dtd with a fade in rather than wait for true positive, but what invariably happens is that they track and chart for months before TTC, and then the month they are ready to start trying, their OPK goes positive in an entirely different pattern and it's all blown to heck anyway.