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Conception date

My girlfriend cheated on me and had sex with her ex once last Dec. 27, 2013. She has irregular menstruation and we thought that she could never be pregnant. We had sex on Jan. 1, 2014 and has been doing it since then.  Last Feb. 19, 2014 we learned that she was pregnant. In her ultrasound on the 20th, it was six weeks old. Am I the father of the child?
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Avatar universal
Dang bro I'm in the same situation as you.
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honestly i have been confused about it. I just want to make that what happened to them last December didn't brought that baby
134578 tn?1546634665
It doesn't sound like she got pregnant in December, but in January.  Please clarify some information:

-  Did the doctor say the exact words "You are at 6 weeks 0 days"?  Or did the doctor say 6 weeks and some number of days, like 6 weeks 3 days or 6 weeks 5 days?  

-  Had you discussed with the doctor that you needed to know a conception date, using the word "conception" specifically?  This matters.  Doctors do not usually begin the pregnancy count on the day they think conception was, they start the count on the first day of the woman's last period.  (No, they don't think she was pregnant then, she was having a period.  But they begin the count on the first day of bleeding of the last period she had, because that is a clear signal.)  If the doctor just said a number of weeks and didn't know there was any question about conception, he or she would NOT have been saying "the baby is 6 weeks old."  He or she would have been saying the time from the first day of her last period to now is 6 weeks.  That's called a gestational count.  

So -- how did the doctor get to the date of 6 weeks? and was it 6 weeks and some days or 6 weeks 0 days?  Did she get an ultrasound?  Or did the doctor just begin his or her computations with the first day of her last period?  And did the doctor know you two were wanting to figure out about conception?
Avatar universal
Hi ,I Found Out I Was Pregnant 4/15/13 . I have irregular periods and im not sure who is the father .Ive had sex 10/29/12 -11/4/12 then round april I was with someone else .im not sure at all and my due date was December 25 , 2013 . The information I got was I ovalated 4/3/2013 and last menstrual estimate 3/20/13 . Then ,conception 3/30/2013-4/7/2013 '. Idk what to do .my baby is now 3 months
134578 tn?1546634665
You are worried that having sex with someone in October and November of 2012 produced a baby that was born in December of 2013?  
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