Bohne wrote:[quote="Andrew2006"]... and we found out she is 7 weeks and 4 days pregnant.
I never knew a doctor could put it down to the exact day...
Mine just told me, by judging the size of the fetus, I'd have to be in week 7.[/color][/quote]
They do it based on the first day of your last period, so they do get it to the day. It's not 100% accurate because you're counting 2 weeks of not actually being pregnant but it allows them a window of 2 weeks either way to set your due date.
In reality, the fetus is 5 weeks, 4 days old.