If you know your dates are different by LMP or conception (if you know your cycles are longer than the average 28 days that the LMP is based on) which dates would you go by? I'm 6 weeks from LMP, but if I look at conception, then add 14 days I'm 5+1. I think the reason is because I want to sort out an early scan and can't decide on when to do it, whether to wait until it's a little bigger or not. I had one at 5+6 last time, saw a heartbeat and later miscarried, so I worry that seeing an early heartbeat might not be as reassuring as it should me for me. I can't wait til the 12 weeks are over, the 2ww is nothing compared to this!!