Hon, are you checking other signs of ov too - like CM? It could just be the monitor I guess - I knwo another girl on here who didn't get a peak one cycle, but you shoudl also be aware that it is quite normal for women not to ov every single cycle, although if you were born in 87 (just guessing from your screen name) this is more unlikely as you are young... I also use IC opks and check CM as I don't like to rely on one method of checking ov... TTC is so stressful when out bodies do things we don't understand - it could just be a late ovulation this month too... Sorry i can't give you answers, but hope something happens for you soon xxxx