You know..my doctor said something similar, i didn't know my last period date, so by the size of the baby he said i was 7w3d. He was thinking of "giving me" an earlier due date *counting the fact that this is not my first baby* and that i have had my kids "right on schedule" so he kept counting and counting and he said "let's just keep it July 1stto be safe". Which i agreed on, he did mention a date like June 26 or 28. Maybe the way your uterus was measuring or something??
This will be my 3rd baby and I truely think I ovulated early.
The ultrasound is not THAT accurate. Doctors commonly don't take the ulrasound's suggested due date over YOUR suggested due date unless you periods are wildly irregular, or if the U/S date is 5 or more days different... I guess your period are regular? (or no?)
Mama to twins Benjamin and Jennifer (3/1/2007)
Easy calculation from LMP: add 7 days to your LMP and subtract three months: 9/27/10 + 7days =10/4/10 - 3 months = 7/4/10