DD Question

What is more accurate, if you enter your first day of last menstrual cycle or if you enter the day you conceived?

If i enter first day of last menstrual cycle, i get a due date of Oct. 25

But if i enter the day of conception i get a dd of Nov. 4.

I know its not that big of a difference, but i wanted to know what's more accurate.

Re: DD Question

That happened with me too. I put in my day of last menstrual cycle and got 8/31 but when i entered the date of conception (i used the CBEFM) i got september 6th-ish. My doc asked for last day of mentrual cycle so that is what i go by. My due date is 8/31.