First Day of Last Menstrual Period: June 2, 2012
Probable Date of Ovulation: June 16, 2012
Possible Dates of Conception: June to12 to June 20, 2012
Due Date: March 9, 2013 (40 weeks)
This is the calculation that I came up with. Hope this helps. Personal opinion, I would say that the guy you had sex with on June 27th is not the father. Good luck to you!!
Remember the conception date is just a guess it's not 100%
Depends on ur cycle n when u slept with him