[The heterosis effect in newborn infants]

In a sample of 410 Families eight body characteristics were examined concerning the appearance of heterosis effects in newborns. Distance between the parents' birthplaces, ABO blood groups and morphological typology were used as measures for the genetic differences of the parents. The t-test was applied to test differences between newborns of different distance groups of homogenic and heterogenic parents. Differences were scarcely seen. The best criteria for classification proved to be the categorization by morphological typology of the parents.