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Conception Date


My due date is 14th June by ultra sound at 12 weeks. When is my likely conception date? I slept with one man on 1st September and then another man thereafter. I thought I had a period around the 11th Sept but I am confused after reading about spotting.

Thanks for your help
4 Responses
Avatar universal
how long did your period last ?
Avatar universal
3-4 days
134578 tn?1546634665
Using an ultrasound from the 12th week of pregnancy means you need to add +/- 7 days to all the dates below, but even so it definitely does not sound like Mister September 1 had anything to do with anything.  Here is what the conception calculator says about your due date of June 14.  

     Computed first day of last menstrual period:  September 7
     Probable date of ovulation:  September 21
     Possible dates of conception:  September 17 to 25
     Due date:  June 14 (40 weeks)

Given that your due date came from a 12th week ultrasound, and even if we use the slight discrepancy with the date of your period to assume it might be a few days off (to be expected when the margin for error is 7 days) I'd say you did not get pregnant any earlier than September 17.  
Avatar universal
Thanks I didnt think the 1st could have anything to do with it! Just wanted someone else's view on it!
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