Ok i've been having sex with man (A) all through january 2011. The beggining of my last menstrual period was January 1 2011. Than on January 25th I slept With man (B), and the doctors say that my due date is october 16 2011. Who is the father? Please Reply A.S.A.P!!!!!
Your doctor think you ovulated and conceived around Jan 23. So sex from around Jan 18 until Jan 24 could have gotten you pregnant. Even the most accurate estimation can be off by plus or minus 2 or 3 days so it is quite possible that sex with Mr Jan25 (B) got you pregnant.
You will have to have a paternity test done if you really want to know who your baby's father is.
I am in the exact same position. I had sex with Man A on January 12, but he pulled out. I had sex with Man B on January 21. I am due October 16 which means conception occured on January 23. My due date was calculated by means of a vaginal ultrasound. I am not sure exactly how accurate this is, but everyone is saying that Man B is the father!