I dont know the exact stats, but your chance of having twins is definitely increased if u have a family history of twins. Particularly fraternal (non-identical) because it means that the women in your family have a genetic predisposition to releasing several eggs in a cycle. Your partners history is not relevant, however your fathers history is, if the women in his family have non-identical twins this genetic code could have been passed onto you. Also your age has a big part to play in increasing your likleyhood, if your are over 35 your chances increase greatly. In my family my mothers grandmother and my fathers grandmother both had a set of non-identical set of twins, however they were both in there 40s. Therefore it may not be a genetic thing, but more an age thing, and thus I don't really think I have more chance of having twins, but I guess statistically I have more chance than someone who has zero family history. In saying that, I would love to have twins, what a blessing!