[Consanguineous analysis of oligophrenia]

Consanguineous analysis of 214 cases of oligophreny has shown a statistically significant higher level of inbreeding in a population of oligophrenes as compared to the general population. No linear dependence was observed between the degree of oligophrenic defect and the inbreeding coefficient. A high statistically significant level of inbreeding was established in cases of familial oligophreny as compared to sporadic oligophreny. A probability of the existence of the genes of oligophreny linked with the X-chromosome is not excluded.