response: I'm not sure, but the Yoruba people have the highest twin rate in the world, possibly because they eat a yam that contains a natural phytoestrogen.
original_response: I'm not sure but the Yoruba people have the highest twin rate in the world possibly because they eat a yam that contains a natural phytoestrogen
history: I have a twin in real life and when people see us together, I get real sick of them asking if we are twins! How interesting! A developing fetus is called a singleton if they are alone but a multiple if there is more than one developing! Those embryos sure like multiplying! I wonder if twins are more rarer than triplets? I don't actually know, though the twin rate rose 76% between 1980 and 2009, ending up at 33.3 for every 1,000 births. Wow, do you know what caused the spike in the rate? Is it a genetic thing?
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.