My sister had fraternal twins at 23, and twins run on my mother's side of the family, though she, her mother, and none of my siblings are twins. I was wondering if my chances of having twins is greater since my sister had twins.
if fraternal twins run on your mothers side of the family, then you have a slightly higher chance of having twins because most likely women on your mothers side release 2 eggs per month - therefore a larger chance of having fraternal twins.