The thing is that just because you're having O pains and changes in your CM, doesn't necessarily mean that you ARE O'ing. Quite often the body can show all of the signs and not quite be ready to pop the egg. The only sure signs of O are a) thermal shift b) bloodwork and c) pregnancy.

These OPK's are the first I have ever had any form of line on (have tried Ovunow and Fortel in the past), but I still haven't seen a + one yet, although I am reasonably confident that I will.

Lisa