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A member asked:
I have an 8 wk ultrasound done 4/24. it dated me at 8 wks/5 days. do i use a calender and go back 8 wk/5 days to determine the possible conception dt?
A doctor has provided 1 answer
NO: If the estimated gestational age is 8 weeks and 5 days then the likely conception date would be 6 weeks and 5 days before the date of the ultrasound. Pregnancy dating is based on the LMP which would be two weeks before ovulation and conception.
Answered 1/28/2015
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