Well if you have only been with her for 2 months then its not yours man. They can tell pretty much almost to the day how old the baby is by the size and development of the organs and the levels of hormones in her body. There is no connection between the potency of the sperm and the development of the baby in the womb. The potency would come into play if she had pregnancy problems. Sorry to tell you but you dont have super sperm!~ LOL. It seems she was with someone 2 months before you. Better have a test done on that for sure or else she MIGHT try to snare you for some one elses baby. And if you marry her, that baby is yours no matter who got her pregnant and you will be supporting it for 18 years to life. I heard about a lady that had 3 kids, all from different guys, all while married to a poor guy that had no clue and when he found out they were not his, he filed for divorce and he got it, but he still has to full support the kids until they are all 18, and he even knows the real fathers, but the courts dont care. 3 times 700 a month, plus allimony for getting cheated on. You gotta love it.
Hmmmmmmmmmmm none on this one.