"Third, and perhaps most important,
is the question of potential reproductive effects of
Cl02 and its by-products implied, but not established,
by the reduced incorporation of 3H-thymidine
into testicular DNA. The fact that this effect
occurred at quite low doses of Cl02, Cl02- and Cl03-
raises the level of concern considerably"
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1569035/pdf/envhper00463-0021.pdf