Phthalates, a chemical found in baby products, may cause possible reproductive problems. A study published in the journal Pediatrics reveal that elevated levels of the Phthalates, used in fragrances and plastics, were found in the urine of babies after the products' use.

Pediatrics said "some phthalates can alter human male reproductive development, but sources of infant exposure have not been well characterized."

Researchers measured nine phthalate metabolites in 163 infants who were born in 2000 to 2005. Baby products were administered and urine samplings were observed for 24 hours.

The study reveal strong concentrations of the chemical in the babies' urine after the use of shampoos, powders and lotions. Infants are more vulnerable to developmental and reproductive toxicity of phthalates given the babies' immature metabolic system capability, the study said.

Environment groups have lobbied against the use of the chemical, however, government health authorities say there is "no compelling evidence" that the chemical poses a safety risk.

The chemical is not regulated by the federal government, but the state of California and some countries have restricted its use, AP said.

The Personal Care Products Council downplayed the study. The council said the chemicals could have come from diapers or other sources.