Study on possible increase in twinning rate at a small village in south Brazil.

  title={Study on possible increase in twinning rate at a small village in south Brazil.},
  author={Ursula da Silveira Matte and M. G. Le Roux and Bernard B{\'e}nichou and Jean Paul Moisan and Roberto Giugliani},
  journal={Acta geneticae medicae et gemellologiae},
  volume={45 4},
A high frequency of twin births has been observed in Linha São Pedro, a small settlement which belongs to the city of Cãndido Godói, located 524 km Northwest from Porto Alegre, Rio Grande do Sul, Brazil, in an ethnically homogeneous population of German descent restricted to a small geographic region. From 1990 to 1994, the proportion of twin births in Linha São Pedro was 10%, significantly higher than the 1.8% rate for the state of Rio Grande do Sul as a whole. Genealogical analysis showed a… 

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