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Do I need prenatal paternity testing?

I am about 15 weeks pregnant with my first child. My boyfriend and I had tried to conceive in the past with no luck and stopped trying but he would still refrain from pulling out from time to time. My due date is July 10th which put my date of conception around the 12-20th of October. I had sex with someone else on the 15th of October. We used a condom, the first one broke before any ejaculation and a new condom was put on before continuing. Im worried that it could be the other mans child since my boyfriend and I never had any luck, or this could have been a correct timing situation for my boyfriend and I. I'm worrying myself sick about it because my boyfriend and his family are thrilled to welcome a new baby and would
Be devastated if it wasn't his.
Help!!!!!
4 Responses
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134578 tn?1693250592
COMMUNITY LEADER
It won't help, since the earliest ultrasounds are the best for this purpose.  By the time you are at your 12th week, many doctors will say there is a margin for error of +/- 7 days if using an ultrasound to try to determine a due date.

I would explain the issue to the doctor and ask him or her to look through the ultrasound records from previously, and to determine whether the due date that was given to you was computed only from the baby's measurements and developmental markers from the ultrasound, or if it was given to you by measuring forward from your last period.  The due date based ONLY on the ultrasound is the one that should be used, even if it disagrees with the one from your last period.
Helpful - 0
Avatar universal
I'm really not sure. They measured around 8 weeks but said they would stick with the 9 week mark they set from me telling them the last period I had. Maybe they will tell me different when I go for the 2nd ultrasound?
Helpful - 0
134578 tn?1693250592
COMMUNITY LEADER
You are saying you know that they did not give you the due date just from the information on your ultrasound, but they computed it instead by counting forward on a calendar or little wheel from the first day of your last period?
Helpful - 0
134578 tn?1693250592
COMMUNITY LEADER
Hi, Jujub, how did you get the due date?  The estimate of the conception date is only as accurate as the method that gave you the due date.  Was it from an ultrasound?  If so, how early in your pregnancy was that ultrasound?
Helpful - 0
1 Comments
I got my first ultrasound when I was around 9 weeks. They used the first day of my last period which was oct 4th.
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