Twins, the birth of two offspring from the same pregnancy, is a relatively uncommon phenomenon, and as such, twins are often regarded as special. Worldwide, the birth rate of twins varies by region and country. Latin America and Southeast Asia have the lowest rates, with only about 9 sets of twins per every 1,000 births. In Europe, the figure is about 16 twins for every 1,000 births, and in the United States, it is about 33 for every 1,000 births. And in central Africa, that number raises to around 18 to 30 sets of twins for every 1,000 births. However, the Yoruba people of southwest Nigeria boast the highest number of twin births in the world, with about 50 sets of twins for every 1,000 live births. And in Yorubaland, one town in particular appears to take the prize for the highest number of multiple births in the world. Igbo Ora, a sleepy agrarian town 80 kilometers from Lagos, is easily the twin capital of the world: unconfirmed estimates from the town say it boasts a mi...