For 3 cycles now I have not been able to catch a LH surge using OPK's. I did however, get close , and ovulation was then confirmed by temping! So I wanted to give ladies hope out there. It seems like everyone is different and some people just dont have long enough (or strong enough) surges to show up on an OPK.... but still ovulate!! Also...i really recommending temping everyday to get your BBT. it has become second nature and it is so easy. Buy a 10 thermometer, pop it in your mouth as you wake up to your alarm and jot it down. (Or in my case type it into the iphone app)!