[Rennie]

I have really long cycles (avg 42 days for the past 4-5 months).

I just started using the fertility monitor by Clearblue Easy. So far so good. I'm on CD19 and have goten 3 'high' ratings in a row. I've looked at other charts and I see that some people only get a few, but others get a lot of high days before they peak. And for those with long cycles, it seems to be the latter.

I'm wondering in the monitor just gives a high rating around early in a cycles because the avg woman O's aorund day 14. Is it really reading my LH levels or is it just guessing because I'm around the time when I should O if I had 'normal' cycles?