I have used Clear blue advanced OPKs for 2 months now but not seen peak fertility. They are supposed to show at least 2 high fertility days and 2 peak days just before ovulation. I have not seen peak so far and only 2 days of low and 6 days of high fertility. I hope that the hormone levels are just too low to be detected instead of me not ovulating. Since I am having period I assume I am but it's frustrating not to know. Is anyone else using them? 3dpo now so the TWW had started...