Quoting Derpy the Duck:" You would have had to ovulate earlier than that app is saying, there's no possible way you could get a bfp at 4dpo. Implantation wouldn't have even occurred at that point. "YEAH exactly. I don't believe the app anyway. By an ER U/S I was a week behind from my lmp. I guess I could go online and check out some more websites
Quoting hobbit*:" <blockquote><b>Quoting katxo[13wks]:</b>" Here's what I got off of count down to pregnancy's ... [snip!] ... Because I know I OD on 28th and its given me the same due date as my first dating scan did. So id say that website is right."I got my strongest surge on the 2nd of December. I was just wondering if I maybe I had conceived after my O date or before.... I was straight up using OPK's for like the first 8 months of TTC.