This figure appears to vary by region, race and ethnicity.
Certain ethnic groups produce more twins than usual.
While researchers agree that identical twins happen by sheer chance, having fraternal twins is hereditary.
In fact, race and ethnicity seems to play a major role in twinning.
As many as45 to 50 sets of twinsare born here per 1000 live births.
In other words, nearly 10% of the population are twins.
But then, the large number of twins being born here could also be a simple matter of genetics.
Either way, for this predominantly rural community, it doesnt matter.
Multiple births are celebrated here and have, over the generations, been regarded as a blessing from God.
Many pregnant women in Igbo-Ora wish for multiple births.
Photo credit
Igbo-Ora is not the only town where youll find skewed twins birth rate.
In BrazilsCandido Godoicity, near the Argentine border, a similar twin phenomenon occurs.
For decades researchers struggled to explain the high concentration of twins.
As the Allies started closing in on the Nazi German regime, Mengele is fled to South America.
Presumably, Mengele had successfully cracked the twin code leading to the increase in the town population.
This town of 20,000 is home to more than 200 sets of twins.
So he launched a Facebook page to try and discover other twins from the town.
So far, he has identified at least 200 sets of twins.
This is a village of just 2,000 families.
In the last five years alone (before 2009) up to 60 pairs of twins have been born.
Twins pose for photograph in the village of Kodinhi, India.Photo credit
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