"Kodinhi small town in kerala state of India the town is known for having an unusually high number of twins. It has around 2,000 families, there are something around 250 sets of twins legally recorded there. And , there could be a lot more While the national average of twin births is not more than 9 in 1000 births, in Kodinhi, the number is as high as 45 in 1000 births."