I am in the midst of researching diapering options and was shocked by this statement.
Did you know:
Superabsorbent diapers contain sodium polyacrylate, which absorbs up to 100 times its weight in water. Sodium polyacrylate is the same substance that was removed from tampons in 1985 because of its link to toxic shock syndrome. No studies have been done on the long-term effects of this chemical being in contact with a baby's reproductive organs 24 hours a day for upwards of two years.
Taken from http://www.mothering.com/articles/new_baby/diapers/joy-of-cloth.html