Parfois, certaines des substances les mieux connues, comme le DDT, les PCB, le 2,4,5-T, le toxaphène et le mirex, s'avèrent des produits chimiques qui perturbent le système endocrinien.
In some cases some of the better-studied substances, such as DDT, PCBs, 2,4,5-T, toxaphene, and mirex, are coming up as endocrine-disrupting chemicals, but they are also persistent, bioaccumulative.