When you get a medical measurement, it starts the clock on your pregnancy from the first day of your last period, not from conception. Does that help? If I go to the doctor and he says "You're 7 weeks 3 days pregnant," he does NOT mean 7 weeks 3 days from conception. He means 7 weeks 3 days from (what he assumes to be) my first day bleeding when I last had a period before getting pregnant. Then I would have stopped bleeding after a few days, then my body would have gotten ready and ovulated, and then conception would have occurred, and all of that would be completed about two weeks or so after the first day of my last period. So in my head I would need to hear the doctor's number as 5 weeks 3 days, if I wanted to know about when I conceived.
Then how come at the planned parenthood it meausred for 6 weeks and 1 day but the ultrasounds after from doctors are all going.for the date toknow.sorry to ask this just having doubts. I dnt think its the one guys but keep getting it in the back of my head.
First Day of Last Menstrual Period: May 28, 2012
Probable Date of Ovulation: June 11, 2012
Possible Dates of Conception: June 7 to June 15, 2012
Due Date: March 4, 2013 (40 weeks)