Chances of Delivering Twins


· A couple has a 1 in 80 (1.2%) chance of delivering twins.
· Monozygotic twins occur in 1 out of every 250 births (0.4%).
· Dizygotic twins occur in 1 in 170 (0.6%) in the U.S.
· A woman who is a fraternal twin has a 1 in 10 (10%) chance of delivering twins.
· If she is an identical twin she has only a 1 in 170 (0.6%) chance of delivering twins.
· A mother of twins has a 1 in 20 (5%) chance of delivering twins again.
· A father who is a twin has the same chance of fathering twins as a father who is not a twin.