A lawyer, actually. Just have done this a lot. Is this man an acceptable father?
Of course, once the baby is born, you should also get a DNA test done with both men, since the dates are pretty close together. All of you deserve to have the information confirmed by a certified lab. But I would go through the pregnancy assuming that your conception date was too late for the first guy.
The day of the cycle doesn't matter once you have an early ultrasound, once that happens, the measurements of the embryo and its developmental markers rule. From those measurements they gave you a due date, and from the estimated due date you can figure out an estimated conception date. Yours is from your seventh week, giving a margin for error of +/- 1 day when used to estimate a conception date, and that gives you the bracket of December 5-7 for conception. If you had sex 8 days before that, the likelihood was that all of that sperm was no longer viable. It all pretty much points to the sex on the 5th.
And that means it was 8 days before the 5th that you had sex with the first guy? (You didn't put any dates in your original post.)
Sounds like you got pregnant on or around December 5-7. When did you have the sex with your ex?
Aug 28.. Yes we had an ultrasound at 7.5 weeks... The did not use my lmp because my cycles are long. They used the ultrasound dating scan for edd
Have you had an ultrasound yet? What is the estimated due date of the baby?
My edd matches up to have concieved the exact day my ex and I had sex
Depends on when your ovulated....