Similarities with your charts?

[Taurean]

This is SO something I would (will!) do when I have enough decent charts!!

I don't know the answer hon but I think it's not really the actual temps that you need to consider, it's the trend. An upward tend of high temps that remain high are a good indication you ovulated. I honestly think that's all there is to it.

My BFP chart didn't look like a 'typical' BFP chart at all. My temp actually fell for two days (was just above the cover line) before I got my positive.

ETA: here's my BFP chart with my current chart (we haven't started TTC #2 yet, just tracking my cycles). I hope this link works....

http://www.fertilityfriend.com/journal/revG4JkOZ.png