If my sister is pregnant with twins, do my chances of conceiving twins increase or decrease?
Since your aunt had fraternal twins and your sister is now pregnant with (I’m assuming fraternal) twins, that means twins run in the family and you definitely have a higher chance of conceiving twins than the average person. Fraternal twins run on the mother’s side of the family (your aunt and sister) and identical twins are random, so your chances are definitely increased, although not definite. Good luck.
