What are the Odds of Having Twins?
Multiples
Obie Editorial Team
There are two different kind of twins:
Monozygotic twins
Monozygotic twins are also known as identical twins. The incidence of monozygotic twins is the same all over the world, it's 1 in 250 pregnancies. And not matter if you were a monozygotic twin or not, the incidence is still the same.
Dizygotic twins
The incidence of dizygotic twins in general is 1 in 85 pregnancies, but it also depends on your ethnic background. People from Africa have a higher incidence and Asians have a somewhat lower incidence.
If you yourself were a dizygotic twin then your chance having another set of dixzygotic twins depends mainly on your ethnicity and then it's likely a little higher. For the average person it would increase probably from 1 in 85 to 1 in 50 pregnancies.
If you were an identical twins or you previously had identical twins then the risk is still the same, it's 1 in 250.