I went into my first u/s thinking I was 7 wks based on ovulation date (since I ovulated way late the month I got pregnant), only to find out I was measuring 6 wks. Anyone else off on dating when you know when you ovulated? Perhaps just measuring small/late implantation/still really early in the pregnancy?? Looking for honest answers. I've already miscarried once so I know it's a possibility. Thanks all!