I've heard LP is meant to stay the same length, but mine hasn't (assuming my EWCM/Ov time was when I thought it was). I had 11 days, 20 days, 13 days. 11 and 13 are fine, I'm a bit concerned about the 20 though. Maybe that was just me getting things wrong, but my body feels like it's gearing up to O again and I'm only CD21 (some EWCM yesterday), so have another 3 weeks to AF. So maybe I have alternating LPs? Who knows. I'll see what happens with this cycle and just not let DH near me for 2 weeks just in case (still pre-conception and if I get pg this month my baby will be exactly 1 year younger than niece and I'm dreading the comparisons enough without them having similar birthdays!).