[The average life expectancy of the population: the regional social hygiene determinants].

Results are reported of a socio-hygienic study of a very important biometric parameter--reproduction of the population on a regional level. Changes are analyzed of the average life span (ALS) during the period of three postwar censuses. The ALS in women tended to increase as compared with men and was more pronounced in the rural localities. The main causes of mortality are analyzed. Reduction of ALS due to circulatory diseases which tended to increase during the intercensus periods. Recommendations are given for optimization of population reproduction and increase of ALS.