Hi I'm 23 and pregnant. My last menstrual cycle was 8-21-2013. My cycles are normal. My due date is 5-28-2014. I had more than one partner at this time. I'm trying to figure out when my ovulation would have been. I had sex on 9-8. The guy says there is no way he is the father. He didn't finish but I know it could be pre . I did a ovulation calendar and it says the dates were 9-4 or 9-5.

Anyone who inserted their penis inside you after 8/21 is potentially the father. There is no way for you to pinpoint ovulation and/or conception accurately enough to eliminate anyone. The guy who says "no way" doesn't know enough about the process.

The only way you will be able to tell for sure is with DNA testing after the child is born. So be prepared to have that done.