Paternity Question - Who is likely to be the father?

[Elizabeth0531]

I'm looking for some guidance on my following issue. I am currently pregnant (25 weeks 2 days) and do not know who the father is.
I had unprotected sex with guy #1 September 2, 4 and 6. September 2 guy claims to have ejaculated a little bit inside me. The other days he pulled out. I then had unprotected sex with guy #2 September 12. As far as I remember the first day of my last menstrual period was August 21st, 2015. I never know the exact day my period comes but do know the week it should arrive. I should have had my next period the week of September 14th. I recall that week I had some spotting (probably implantation bleeding). When I initially went to my OB according to my LMP my due date set to 5/27/16. I had my first ultrasound November 5 - which showed gestational age 10 weeks 2 days and my due date was modified to 5/31/16. Is guy #1 or guy #2 more likely to be the father?

[AnnieBrooke]

Guy 1 has the edge over guy 2, but unfortunately it is too close to call from your ultrasound since it was in your tenth week.  All it would take to put guy 2 firmly in the running is for the information from the ultrasound to be 4 days off, and in your tenth week there is a margin for error of about that many days when using an ultrasound to make this kind of determination.  In your shoes, I would assume guy 1 has the better chance but plan on a DNA test once the baby comes.

[Elizabeth0531]

Annie thank you so much for your response. The two guys are different races and it should be evident once the baby comes. I appreciate you getting back to me!