Our study did not show significant genotoxic effect of oral contraception containing 0.03 mg ethinylestradiol and 3
mg desogestrel. There was not observed the change of melting temperature of genomic DNA of the control group of
women and the group taking oral contraception. Only minor change for backward fragments of DNA - a deletion in
the sequence on the 50 bp position for the group exposed to the oral contraception - was occurred