Anyway, they told me the conception date would have been about Feb 14th.
I had a ultrasound on April 1st and they said i was 8w3d pregnant with my son.
Hey did you ever find out whether the conception date was off by 10days or not.
I'm in the same situation whereby my midwife has told me that my conception date is around the 24th of September but I've worked it out to be either the 9th or 16th of September and can't remember my last period.
Conception date means when sperm met egg, not necessarily when you had sex.
You'll conceive right around the time you ovulate (as the egg lives 12-24 hours after ovulation).
This is where our wonderful ultrasound machines can make a crucial difference.If you have an irregular cycle, or if you've recently been taking the contraceptive pill, working out the date from your LMP isn't a very accurate method.Ultrasounds are more accurate than using the LMP and, if the ultrasound date differs from your period dates, the ultrasound date will be used.In fact, when a woman who has very regular, "textbook" 28 day cycles presents for prenatal care, this often turns out to be the correct EDC more often than not.Other information used to calculate the gestational age, or the number of weeks and days from the first day of the last menstrual period (LMP), includes the size of the uterus on pelvic bimanual examination.