After much agonising I finally decided to drop the $45 for the annual FF subscription yesterday just so I could get it to analyse my charts - and I so don't like what it says! I was tracking myself here - http://go28days.com/Hope/charts/2009-08-02 and think that I Od on CD20 - kinda felt O pains and also *think* I got a positive OPK - it was definitely negative the day before and the day after. When I plugged my details into FF I left out the test and just put in the temps - and it says I didn't OD until CD24 - which means we stopped BDing way too soon!!!!! I tried plugging in the OPK and it pulled O back to CD21 - so either way I'm at least a day out but maybe 4. So I thought the would come tomorrow - but now it might be next Wednesday! http://www.fertilityfriend.com/home/hope-chart I'm going to leave the two charts as they are and see which ones turns out being correct! If the does arrive then I'll be extra careful next month with temps and poas so that I know to trust the results. Anyone care to look at the charts and see which one you'd go with?