sasha28 - your temp after O should be at least .4 of a degree higher than your coverline and if conception is achieved it would rise even higher after implantation and keep rising as you get close to AF time. It would be very noticeable on your chart. I only had one pregnant cycle in all my temping cycles and it was no surprise when I got a positive test as you could see it with the rise in temps. I wouldn't test until 10DPO though because hardly anyone ever gets a positive before then and it just becomes a waste of money testing early month after month...just a little piece of advice.