Ob-Gyn questions? Ask a gynecologist online.
In this scenario, it is possible for either man to be the father of the baby. The sexual encounters were so close together that there's no way to be sure who is the father just on dates alone. Even if the ultrasound were accurate in dating the conception, the margin of error is too large to pinpoint who the father is. The only way to be sure who the father is in the scenario is to do a paternity DNA test. Hope this helps and let me know if you have questions.
Yes, it is possible to conceive one day before your period, but the chances are low at that point.
What date did they give you as the approximate conception date based on the ultrasound?
OK. This would put your conception date somewhere at the end of April. So your encounter on 4/29 would be most likely. Hope this helps and let me know if you have questions. Please don't forget to leave a rating. Thanks.