Hi, this is probably a silly question and I think I know the answer but just wanted to check what others think.

Basically I usually have a 26 - 27 day cycle, however this month for the first time in 7 months of using CBFM I ovulated later than usual.

AF appeared on 3rd June, was gone by 6th June and I ovulated on 20th June so I'm guessing that 14 days after that AF will be due on 4th July - if this was a usual 26-27 day cycle Af would have been due 28th June.

What do you think?

Thanks x

found this for you:

'Your follicular phase is more likely to change from month to month than your luteal phase. The length of your luteal phase (the time from ovulation to menstruation) tends to be consistent for each person.'

My cycles are always different lengths, but it I agree with what Tansey says: It is the bit from AF to OV that changes every time. My Luteal Phase (OV to AF) is always 13 days without fail. If you are monitoring your OV with CBFM, then you should be able to predict your AF: it should be the same length of time as previous cycles.
Hope that makes sense and good luck!
xxxx