I usually ovulate around CD 14/15. Earliest bfp was 8dpo, latest was 10. This pregnancy I Oed on CD 15 and got my bfp on CD 24 (8dpo) evening. I thought it was 10 but I was iffy with my crosshairs and ff eventually moved them plus my early ultrasounds at 5 6, 9, and 12 were all consistent with a CD 16 O. I had iffy faint lines the days leading up to my bfp.