I haven't had to deal with cycle changes yet, though it's looking like i will be O'ing late this time around, if I o...I should have o'ed today but my temps are still low...just waiting to see what happens.
So to answer your question....after you chart your temps for a few months you'll get a better idea of how long your LP is and when you O and you can just start BDing based upon when you O'ed from previous months...that's what we're doing. I knew I should be O'ing any day now so BD'ed last night and will continue to do so at least every 3 nights until after my chart shows I O'ed...though it will probably continue until AF shows up!
Hope that answers your question...tired today and brain a little slow and muddled....

...probably like my reply!
