What are the chances this guy is the father?

[mmk223]

Hi, I really hope someone can give me some advice. I'm freaking out.

I had my LMP on February 3, 2016. My cycles have always been between 27-30 days, and for the last 4 months my period has come on day 29. I had sex with my bf on 2/14 and we used no protection and he didn't pull out. We broke up for a few days over some stupid fight and I had sex with someone else on 2/20 (well, at like 2am). He pulled out, but we had sex more than once so there still could have been sperm in the precum (To bad I didn't think about this at the time, huh). My doctor, who knows my situation, gave me an ultrasound on 3/24 and dates me at 6w5d based on the size of the baby (.79cm). He told me my due date was on 11/10 and the baby was most likely to be my boyfriends, but I have a feeling he's trying to get me to keep the baby despite paternity. Everywhere else I checked puts my due date on 11/12 and that would put conception around 2/20.

I guess I'm just wondering what you all think? I obviously can't talk about this with anyone else, even though my bf knows about the baby at this point. I'm planning on getting a CVS to help determine paternity at 10 weeks, but what are my chances this is another mans baby?

[mmk223]

I don't think he inaccurately measured the baby, but when I asked him how far along I was he said 6w6d and then he gave me the 11/10 due date. I asked him about the accuracy of using fetal growth to date pregnancy and he said it could be + or - two days. It wasn't until I was in the car that I noticed the ultrasound said 6w5d, not 6 like he said. So I do believe that he is stretching the truth a bit.

I've found a doctor who would be willing to do the procedure for me, but I haven't done enough research on him yet to decide whether its worth the risk. I think I will go to a clinic and get a sonogram from a completely un-bias person to see if perhaps they give me a different due date. I trust my doctor is good at his job and has my best interest in mind, but he is in the business of bringing life into the world so I can see how he would be skeptical to provide information that might help end one.

As for the non-invasive prenatal DNA test, I've been in contact with DDC and they tried to convince me that was the best way to go but I can't help but be skeptical. The most information I've been able to find has been on them were from forums like this or the pregnancy websites, but they seem to have mixed reviews. I just don't know if I'd be willing to base such an important decision on a DNA test that has a possibility of being wrong. That would just be so devastating.

[AnnieBrooke]

I would tend to think from all you have said that the 6 weeks 5 days figure gives you an ovulation date of the 20th, meaning your due date would not be 11/10 but 11/12.  Do you really think the doctor cooked the results in order to encourage you to keep the baby and not get an abortion?  Because it is his 6 weeks 5 days figure that I'm going from -- if you had an ultrasound on March 24 and 6w5d was the GA given by the ultrasound, it doesn't sound like you conceived quite as early as the doctor said.

This doesn't rule out your boyfriend, but it certainly rules in the other guy.  It's unlikely that you can get a doctor to do chorionic villus sampling merely for this purpose, as there is risk to the baby with that procedure, but you could certainly do a prenatal DNA test with Ravgen or the DDC relatively early in the pregnancy at no risk to the baby, as it is just a blood draw from your arm.  If you do, I would suggest testing with both guys, hard though it might be to tell your boyfriend, because some of the women on this site have had real difficulties with feeling ambivalent about their test results and it would have been better for them if they had tested both guys and gotten a clear yes and no.