5 times as likely to have twins
as someone from the general population. A mother of fraternal twins
is 3-4 times more likely to have another set of fraternal twins. A woman who is an identical twin is no more likely to have twins compared to someone else.
Why do fraternal twins run in the family but not identical twins? It makes sense once we understand the differences between the two types of twins.
Identical twins come from the same fertilized egg and are sometimes called monozygotic.