Kodinhi, the village which has the highest number of twins in the country still continues to be a unsolved mystery to the researchers. Situated in Malappuram district, Kerala, the village has atv least 400 pairs of twins.
While the national average of twin births is not more than 9 in 1000 births, in Kodinhi, the number is as high as 45 in 1000 births.
In October 2016, a joint team of researchers from various institutions including CSIR-Centre for Cellular and Molecular Biology, Hyderabad, Kerala University of Fisheries and Ocean Studies (KUFOS) and University of London and Germany visited the village to find answers to this phenomenon.
The researchers collected saliva and hair samples from the twins to study their DNA. The study is simultaneously being conducted in Kodinhi, Hung loc commune in Hung Hiepfrom South Vietnam, Igbo-Ora in Nigeria and Cándido Godói in Brazil, where the number of twin births is high.