response: I'm honestly not aware of that, however have you heard of the Yoruba people? They have the highest rate for twins in the world, 90-100 twins for every 1000 live births!
original_response: It seems to be - the yoruba people have the highest rate of twins in the world - 90 to 100 twins per 1000 live births
history: Do you happen to know any twins? I do not, do you and would they be fraternal twins? Fraternal twins are those who each got fertilized by a sperm cell. What is the difference between fraternal and identical? Identical twins develop from one zygote, while fraternal develop from two different eggs So I guess then boy/girl twins are always fraternal. I'm not able to say, but each twin would be fertilized by their own sperm cell. It's very interesting how twins seem to run in certain families - is it hereditary?
knowledge: The Yoruba peoples have the highest rate of twinning in the world, at 45–50 twin sets (or 90–100 twins) per 1,000 live births, possibly because of high consumption of a specific type of yam containing a natural phytoestrogen which may stimulate the ovaries to release an egg from each side.