What would my due date be?

So my last period was December 1st but I think I ovulated 8 days later than I should have. Will the doctors go by my last period? Is that what I should do?

Unless you're certain of your exact date of conception, they'll go by your LMP. They'll also most likely do a dating U/S but they won't change your due date based on that unless it's off by a couple weeks.

ETA: So your EDD would be September 7th  

They will probably tell u Aug.1st

Mine goes by LMP. My early u/s and LMP EDD were only 1 day off

Quoting Lizplustwo:" Unless you're certain of your exact date of conception, they'll go by your LMP. They'll also most likely ... [snip!] ... they won't change your due date based on that unless it's off by a couple weeks. ETA: So your EDD would be September 7th  "