So my periods used to be regualr, and now Mr Sod and his law has meant the min we decide to try they're not! Ive just had a 28day cycle but the one ebfore that was 34 and the one before that 32....so do I calculate my ovulation on a 28day cycle or go for say 32 to fit between the longest and shortest...I'm a little confused and hoping someone a little more clued up on this could help me out. Thank you in advance. Determined to not have AF appear end of Feb!