Twins

I remember reading about twins and yams in Africa a while ago. I believe it was in a cookbook. Probably not your best source for scientific info. So, it is nice to see an article about it.

But West Africa bucks that trend, particularly with a much higher incidence of fraternal, or non-identical twins than in Europe or Japan. That is especially true, experts say, amongst Nigeria's Yoruba community which is largely concentrated in the southwestern part of the country where Igbo-Ora is located.

Overall, almost 5 percent of all Yoruba births produce twins, the Belgian study said, compared with just around 1.2 percent for Western Europe and 0.8 percent for Japan -- although fertility drugs in the developed world are changing those figures.