Town with highest number Twins birth rate in the World.

Twins are common in the Yoruba ethnic group that dominates this part of Nigeria.
A 1970s study by a British gynaecologist found that around 50 sets of twins were born out of every 1,000 births in the southwest - one of the highest rates of twin births in the world
Igbo-ora in Oyo State, Southwest, Nigeria is known to have largest concentration of twins birth in the world.