Medical Questions > Pregnancy Forum > Pregnancy Calendar Conception : When did I Conceive ? Forum

What day did I have sex based on Conception and Due date?

My due date is Dec 3 and based on that my conception date is March 12. I had sex on Feb 26 and again on March 12. I need to know which of these dates could be the correct date i got pregnant. I am confused because I had my LMP on March 7 to March 11 which was a light(spotting)period which I am use to because I have irregular periods. I need to know if i got pregnant as a result of having sex on Feb 26 or on March 12.
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replied August 9th, 2011
Community Volunteer
When and how was your due date determined?
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replied August 9th, 2011
My due date was determine via sonogram when i was according to the sonogram 6 weeks pregnant.
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replied August 9th, 2011
My due date was determine via sonogram when i was according to the sonogram 6 weeks pregnant.
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replied August 9th, 2011
Community Volunteer
It is very unlikely that you got pregnant from sex on Feb 26.Iit is almost impossible that a sonogram could have been wrong by 2 weeks at your 6 week scan.

As you said, you ovulated and conceived around March 12. So sex between about March 7 and March 13 got you pregnant.
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