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A member asked:
What is my conception date with a due date of september 28th giving at my 8 and 12 week ultrasound ? and how many days can it be off ?
A doctor has provided 1 answer
1/7/2014: Is the best estimation of the date of conception. The 8 week ultrasound establishes your due date +/- 5 days. Therefore it could be few days before or after. Period dating is the most accurate if you are sure of your last period.
Answered 2/1/2015
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