Small Village Boasts 250 Set of Twins- Is It the Food?

This is pretty interesting.

For those out there that so so so want twins:

why are there so many sets of twins in the village? Doctors are stumped.
Sribiju has ruled out genetic factors and dismisses any suggestion that a pollutant could be the cause, saying that the twins have been born healthy. And infertility treatments like in vitro fertilization haven't been used in the village because of the expense.
"I feel that it is something to do with what the villagers eat and drink," Sribiju said