But when we're swaying we're usually doing things to counteract that - Rephresh, Antihistimines, Diet etc. - and others to alter hormones like Vitex and Saw Palmetto. I also think that charts don't disclose the full picture, they only show when people DTD (and not releases outside of DW) and they don't tell you anything else about the couple. It would only be valid to compare them if everything else about the couple was the same! I've seen plenty of girls conceived on O day (including my own!). I think in general that most ladies spend way too much time stressing over timing - I do understand the temptation to do that (and I probably did it in the first instance!) but I'm absolutely convinced that timing doesn't matter in the slightest and, if it does, that it's different for each couple. For example, I have very little CM on O day but a tonne of it 3 or 4 days beforehand. I wouldn't DTD with a cut-off of 3-4 days because the EWCM would increase my fertility and sway blue but I'm happy to DTD on O day for the opposite reason.