Apparently he has an extra chromosome, cannot produce sperm, so our baby can't be his?

He's probably making this grand story up because he doesn't want to be responsible for the baby...he sounds like a deadbeat. Do you honestly want this guy in your baby's life???? Someone who is already denying her and making up stories just to drive you insane?? If you want child support then I would make his azz take a dna test to prove that he is the dad.... If not, then I would just get the hell out of this dude's life and take care of my baby on my own... Do what is best for you and your baby...