So I just stayed up waaaaay past bed time. Thought I would finally get my data in FF to see what happened. I have been charting using pen & paper for 5 cycles including this one (TTC for 6)... I didn't bother entering in the first cuz there wasn't enough there. This c is too new to count yet. That leaves 3 full cycles on there. Geez!! Seems like it should be more as I feel like I've been in a temping haze for eons! ANYway, my old fashioned pen & paper matched up somewhat with what FF thought, but not as much as I expected. The only thing we totally agreed on was my varying LP length and to talk to the doc about it. Other than that, things varied by a few days... like when o occurred, or when to start a new c. Not enough to make a HUGE difference, but enough to get me curious. A day or two can matter when o time is here!!! Anyone else use both ways and get different results?? Thanks, ladies! I've GOT to get some zzzzzs. c u tomorrow!