Estimated Conception Date Calculator - Based on Due Date

Question
if my due date is October 8, 2007 when was the day that i had intercourse?

Answer
Dear Gabrielle,

According to my calculations (backwards)  :-) ...

If your due date is 10/8/07, your LMP date would have been 1/1/07. This gives you an estimated conception date of 1/15/07 (based on a regular 28 day cycle).

Now - conception date is based on when we would have expected you to have ovulated. Please note that you could have actually had sex a few days prior to the ovulation date and still actually conceived on 1/15. This is because sperm cells can survive for up to five days once past the cervix under ideal conditions.

I hope this has helped you and answered your question. I wish you well.

Brenda