The first month (May 2009) that I used the fertility monitor I got pregnant after showing two peak fertility days. Unfortunately I miscarried unexpectantly at 12 weeks. We are now trying again to get pregnant. I got my period exactly one month after my D&C and I've had two menstrual cyles since. This cycle (Sept. 09) my fertility monitor has shown no low fertility days only high fertility since my period ended. I am now on day 14 of my cycle and still not showing peak fertility although I swear too that I'm having ovulation pain. I hope that I'll show peak fertility in the next few days as I'm 41 years old and desperately want to have child #3.
This was refreshing! I've been TTC for 15 months. Broke down and bought the fertility monitor 3 months ago and have never reached "peak" fertility. I do get my period every month though. My cycle jumps from 25 days to 41 days. It makes sense what you said, hopefully I will see some success. It was also nice to find a blog that wasn't 4 years old!
It is not uncommon for the monitor not to pick up a peak reading. I used one for a long time and found I only got a peak about 50% of the time. The reason being is you can only test once a day and around the same time. If your monitor doesn't see the E2 surge that preceeds the Lh surge, it will never go peak. It works a little different than a plain opk. Sometimes that surge is short and out of the test window for the monitor. If it's over by the time you test again, it will miss it.