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There are handy calculators around the web to figure this out, or you can count back 9 months from your due date (February 8) and add two weeks (February 22) to get a rough idea of conception. I put your information into a calculator at

http://www.baby2see.com/conception_calculator.html#ConceptionCalculator

and the results it came up with were: First Day of Last Menstrual Period:February 2, 2008

Probable Date of Ovulation: February 16, 2008

Possible Dates of Conception: February 12 to February 20, 2008

Due Date: November 8, 2008 (40 weeks)

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16y ago
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13y ago

I will assume you are talking about November 18th 2011. If so, it makes your estimated conception date February 24th 2011. However, this date could be wrong by a couple of days. It also depends on when you actually ovulated.

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15y ago

November 18th 2009? Then it would be roughly Wednesday February 25th 2009

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15y ago

When did I conceive if my due date is April 18th?

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14y ago

Based on a normal gestation period of 40 weeks the conception date was August 25th.

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Q: When did you conceive if your due date is April 18?
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