Sep 4, 2003. Olsen!” as the floor vibrated and seven bodyguards attempted to keep order. They are fraternal twins, but they do look almost exactly alike. 1. Surprising factors can increase your chance of conceiving twins. Genetics play a role (a mother who is a fraternal twin herself has four times higher chance of producing twins), but other factors increase your chances too, including your age—moms over 30 have greater…