The first day of my last period was April 12th. I had sex with an ex of mine April 25th and 26th. The following month I had sex with another ex of mine May 9th or 10th. My due date is January 17th 2013 and my periods have always been regular 28 days.
At this point my partner from April 25th 26th believe's, and has convinced me after using different conception calculators that he's more likely to be my sons father.
My due date is January 17th 2013. With this information what would be my estimated conception dates and according to that, who would be the father or more likely the father?