Infants and toddlers exposed to baby lotions, shampoos and powders carry high concentrations of hormone-altering chemicals in their bodies that might have reproductive effects, according to a new scientific study... Manufacturers do not list phthalates as ingredients on labels, so it is unknown which products contain them... The researchers at the University of Washington and the University of Rochester stressed that the potential effects on babies were uncertain... Some scientists theorize such changes in hormones could lead to fertility problems and male reproductive disorders. Representatives of the fragrance and cosmetics industries said they were surprised by the findings and questioned their validity. They said only one phthalate compound is used in baby products, and it is found in such low levels that they doubt it could explain high concentrations found in the babies... Previous studies have focused on a different route of exposure for children: sucking on soft, vinyl toys.