Record levels of synthetic fragrances from everyday cleaning, deordorising and beauty products have been found in the breast milk of American women.
Kurunthachalam Kannan froom New York state's Department of Health and his colleagues found that levels of syntheic musks in breast milk from 39 women were 5 times those found in European women nearly a decade ago.
http://www.newscientist.com/article/dn11737-concerns-over-synthetic-fragrances-in-breast-milk.html