Cytogenetic analysis of the effect of cosmic flight factors on man]

The results of cytogenetic investigation of 14 crewmembers of "Soyuz" spacecrafts before and after 7 spaceflights are represented. No cytogenetic changes were noted at the investigated crewmembers on the first postflight day as compared to the preflight data. Possible causes of differences between the author's data and the data of foreign investigators on cytogenetic investigation of American crewmembers are discussed in the article.