The doc can tell you when you have a scan. For example, according to my last menstrual period, we conceived on Nov. 7 but according to the scan, we actually conceived on Nov. 12. This is because my cycle (ovulation included) is not the default 28 days
That's what I did :-) thanks for the info this is my first baby and I'm trying to figure out my due date
No one is going to know that but you. You conceived when you ovulated and if you know when that was then you have your answer,if you don't then you go off of the first day of your last period. That why all Dr's date pregnancies with that date.