How do you calculate a date of conception?
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Conception Dates

  • Take the due date or birth date and count 40 weeks back, or take the first day of your last period and count 40 weeks forward

  • See the Related Link for "conception calculator" to the bottom for the answer. Visit this link and scroll down till you get to the table with dates. This will give you an accurate reading of when you conceived and your due date based on your first day of your last menstrual period.

  • You have to know the first day of your last period. Then you can figure out your date of conception. Your doctor can help you find that out too. It may not be an exact date, but it will be close.

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First answer by Dawn177. Last edit by Dateoflife. Contributor trust: 29 [recommend contributor]. Question popularity: 218 [recommend question]

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